Frame - Revision history

Dustingram: Reverted edits by Goprenfcomta (talk) to last revision by Dustingram

2012-07-02T17:58:50Z

Reverted edits by Goprenfcomta (talk) to last revision by Dustingram

← Older revision		Revision as of 17:58, 2 July 2012
Line 48:		Line 48:

	There are a few standard shell widths (68, 70 or 73mm). Road bikes usually use 68mm; Italian road bikes use 70mm; Early model mountain bikes use 73mm; later models (1995 and newer) use 68mm more commonly. The shell width influences the Q factor or tread of the bike. There are a few standard shell diameters (34.798 - 36mm) with associated thread pitches (24 - 28 tpi).		There are a few standard shell widths (68, 70 or 73mm). Road bikes usually use 68mm; Italian road bikes use 70mm; Early model mountain bikes use 73mm; later models (1995 and newer) use 68mm more commonly. The shell width influences the Q factor or tread of the bike. There are a few standard shell diameters (34.798 - 36mm) with associated thread pitches (24 - 28 tpi).

	Advantageously, the article is really the sweetest on this noteworthy topic. I harmonise with your conclusions and will thirstily look forward to your forthcoming updates. Just saying thanks will not just be enough, for the phenomenal clarity in your writing. I will instantly grab your rss feed to stay informed of any updates. Genuine work and much success in your business efforts! =-=

	==External links==		==External links==

Goprenfcomta: /* Frame tubes */

2012-05-15T21:17:14Z

Frame tubes

← Older revision		Revision as of 21:17, 15 May 2012
Line 48:		Line 48:

	There are a few standard shell widths (68, 70 or 73mm). Road bikes usually use 68mm; Italian road bikes use 70mm; Early model mountain bikes use 73mm; later models (1995 and newer) use 68mm more commonly. The shell width influences the Q factor or tread of the bike. There are a few standard shell diameters (34.798 - 36mm) with associated thread pitches (24 - 28 tpi).		There are a few standard shell widths (68, 70 or 73mm). Road bikes usually use 68mm; Italian road bikes use 70mm; Early model mountain bikes use 73mm; later models (1995 and newer) use 68mm more commonly. The shell width influences the Q factor or tread of the bike. There are a few standard shell diameters (34.798 - 36mm) with associated thread pitches (24 - 28 tpi).

			Advantageously, the article is really the sweetest on this noteworthy topic. I harmonise with your conclusions and will thirstily look forward to your forthcoming updates. Just saying thanks will not just be enough, for the phenomenal clarity in your writing. I will instantly grab your rss feed to stay informed of any updates. Genuine work and much success in your business efforts! =-=

	==External links==		==External links==

Dustingram: Fixed lots of missing links. We probably shouldn't copy pages directly from Wikipedia...

2011-01-27T10:26:00Z

Fixed lots of missing links. We probably shouldn't copy pages directly from Wikipedia...

← Older revision		Revision as of 10:26, 27 January 2011
Line 1:		Line 1:
	A '''bicycle frame''' is the main component of a [[bicycle]], onto which [[~~bicycle wheel\|wheel~~]]s and [[~~list of bicycle parts~~\|other components]] are fitted. The modern and most common frame design for an [[upright bicycle]] is based on the [[safety bicycle]], and consists of two ~~[[triangle]]s~~, a main triangle and a paired rear triangle. This is known as the ''diamond frame''.		A '''bicycle frame''' is the main component of a bicycle, onto which [[wheels]] and [[:Category:Bicycle Parts\|other components]] are fitted. The modern and most common frame design for an upright bicycle is based on the safety bicycle, and consists of two triangles, a main triangle and a paired rear triangle. This is known as the ''diamond frame''.

	In the diamond frame, the main triangle consists of the head tube, top tube, down tube and seat tube. The rear triangle consists of the seat tube, and paired chain stays and seat stays. The head tube contains the [[~~headset (bicycle part)\|~~headset]], the interface with the [[~~bicycle fork\|fork~~]]. The top tube connects the head tube to the seat tube at the top, and the down tube connects the head tube to the [[bottom bracket]] shell. The rear triangle connects to the rear [[~~Dropout (bicycle part)\|~~dropout]]s, where the rear wheel is attached. It consists of the seat tube and paired chain stays and seat stays. The chain stays run parallel to the [[~~bicycle chain\|~~chain]], connecting the bottom bracket to the rear dropouts. The seat stays connect the top of the seat tube (often at or near the same point as the top tube) to the rear dropouts.		In the diamond frame, the main triangle consists of the head tube, top tube, down tube and seat tube. The rear triangle consists of the seat tube, and paired chain stays and seat stays. The head tube contains the [[headset]], the interface with the [[forks]]. The top tube connects the head tube to the seat tube at the top, and the down tube connects the head tube to the [[bottom bracket]] shell. The rear triangle connects to the rear [[dropout]]s, where the rear wheel is attached. It consists of the seat tube and paired chain stays and seat stays. The chain stays run parallel to the [[chain]], connecting the bottom bracket to the rear dropouts. The seat stays connect the top of the seat tube (often at or near the same point as the top tube) to the rear dropouts.

	==Frame tubes==		==Frame tubes==
Line 7:		Line 7:

	===Head tube===		===Head tube===
	~~{{main\|Head tube}}~~		The '''head tube''' contains the headset, the bearings for the fork via its steerer tube. In an integrated headset, cartridge bearings interface directly with the surface on the inside of the head tube, on non-integrated headsets the bearings (in a cartridge or not) interface with "cups" pressed into the head tube.
	The '''head tube''' contains the headset, the bearings for the fork via its ~~[[bicycle fork\|~~steerer tube]]. In an integrated headset, cartridge bearings interface directly with the surface on the inside of the head tube, on non-integrated headsets the bearings (in a cartridge or not) interface with "cups" pressed into the head tube.

	===Top tube===		===Top tube===
	The '''top tube''' connects the top of the head tube to the top of the seat tube. In a traditional-geometry [[racing bicycle]] frame, the top tube is horizontal. In a compact-geometry frame, the top tube is sloped downward toward the seat tube. In a [[mountain bike]] frame, the top tube is almost always sloped downward toward the seat tube. ~~''See [[Bicycle frame#Road and triathlon bicycles\|Road and triathlon bicycles]] for more information on geometries.'' [[~~Step-through ~~frame]]s~~ usually have a top tube that slopes down steeply to allow the rider to mount and dismount the bicycle more easily. Alternative Step-through designs include leaving out the top tube out completely, and twin top tubes that continue to the rear dropouts as with the Mixte frame.		The '''top tube''' connects the top of the head tube to the top of the seat tube. In a traditional-geometry racing bicycle frame, the top tube is horizontal. In a compact-geometry frame, the top tube is sloped downward toward the seat tube. In a mountain bike frame, the top tube is almost always sloped downward toward the seat tube. Step-through frames usually have a top tube that slopes down steeply to allow the rider to mount and dismount the bicycle more easily. Alternative Step-through designs include leaving out the top tube out completely, and twin top tubes that continue to the rear dropouts as with the Mixte frame.

	Control cables are routed along mounts on the top tube, or sometimes inside the top tube. Most commonly, this includes the cable for the rear brake, but some mountain bikes and [[hybrid ~~bicycle]]s~~ also route the front and rear derailleur cables along the top tube.		Control cables are routed along mounts on the top tube, or sometimes inside the top tube. Most commonly, this includes the cable for the rear brake, but some mountain bikes and hybrid bicycles also route the front and rear derailleur cables along the top tube.

	The space between the top tube and the rider's groin while straddling the bike and standing on the ground is called clearance. The total height from the ground to this point is called the height lever.		The space between the top tube and the rider's groin while straddling the bike and standing on the ground is called clearance. The total height from the ground to this point is called the height lever.

	===Down tube===		===Down tube===
	The '''down tube''' connects the head tube to the bottom bracket shell. On racing bicycles and some mountain and hybrid bikes, the derailleur cables run along the down tube, or inside the down tube. On older racing bicycles, the [[~~shifter (bicycle part)\|shift levers~~]] were mounted on the down tube. On newer ones, they are mounted with the brake levers on the handlebars.		The '''down tube''' connects the head tube to the bottom bracket shell. On racing bicycles and some mountain and hybrid bikes, the derailleur cables run along the down tube, or inside the down tube. On older racing bicycles, the [[shifters]] were mounted on the down tube. On newer ones, they are mounted with the brake levers on the handlebars.

	[[Bottle cage]] mounts are also on the down tube, usually on the top side, sometimes also on the bottom side. In addition to bottle cages, small air pumps may be fitted to these mounts as well.		Bottle cage mounts are also on the down tube, usually on the top side, sometimes also on the bottom side. In addition to bottle cages, small air pumps may be fitted to these mounts as well.

	===Seat tube===		===Seat tube===
	The '''seat tube''' contains the [[seatpost]] of the bike, which connects to the saddle. The saddle height is adjustable by changing how far the seatpost is inserted into the seat tube. On some bikes, this is achieved using a [[quick release]] lever. The seatpost must be inserted at least a certain length; this is marked with a ''minimum insertion mark''.		The '''seat tube''' contains the [[seatpost]] of the bike, which connects to the saddle. The saddle height is adjustable by changing how far the seatpost is inserted into the seat tube. On some bikes, this is achieved using a [[quick release]] lever. The seatpost must be inserted at least a certain length; this is marked with a ''minimum insertion mark''.

	The seat tube also may have [[braze-on]] mounts for ~~a [[~~bottle ~~cage]]~~ or ~~front~~ [[~~derailleur~~]].		The seat tube also may have braze-on mounts for bottle cages or [[front derailleurs]].

	===Chain stays===		===Chain stays===
	The '''chain stays''' run parallel to the chain, connecting the bottom bracket shell to the rear [[~~dropout (bicycle part)\|~~dropout]]s. When the rear derailleur cable is routed partially along the down tube, it is also routed along the chain stay. Occasionally (principally on frames made since the late 1990s) mountings for disc brakes will be attached to the chain stays. There may be a small brace that connects the chain stays in front of the rear wheel and behind the bottom bracket shell.		The '''chain stays''' run parallel to the chain, connecting the bottom bracket shell to the rear [[dropout]]s. When the rear derailleur cable is routed partially along the down tube, it is also routed along the chain stay. Occasionally (principally on frames made since the late 1990s) mountings for disc brakes will be attached to the chain stays. There may be a small brace that connects the chain stays in front of the rear wheel and behind the bottom bracket shell.

	Chain stays can be straight or tapered tubes. Sometimes, on higher-end bikes, they are sculpted to allow clearance for the rear wheel and cranks.		Chain stays can be straight or tapered tubes. Sometimes, on higher-end bikes, they are sculpted to allow clearance for the rear wheel and cranks.
Line 40:		Line 39:

	There may be a bridge or brace that connects the stays above the rear wheel and below the connection with the seat tube. Besides additional bracing, this provides a mounting point for rear brakes, fenders, and racks.		There may be a bridge or brace that connects the stays above the rear wheel and below the connection with the seat tube. Besides additional bracing, this provides a mounting point for rear brakes, fenders, and racks.

	The seat stays themselves may also provide a mounting point for rear rim or disc brakes. Usually, no rear mount is provided on a fixed gear or track frame.		The seat stays themselves may also provide a mounting point for rear rim or disc brakes. Usually, no rear mount is provided on a fixed gear or track frame.

Line 45:		Line 45:

	===Bottom bracket shell===		===Bottom bracket shell===
	The '''bottom bracket shell''' is a short and wide tube, relative to the other tubes in the frame, that runs side to side and holds the [[bottom bracket]]. It is usually threaded, often left-hand threaded on the right (drive) side of the bike to prevent loosening by ~~[[Precession (mechanical)\|~~fretting induced precession]], and right-hand threaded on the left (non-drive) side. It will be over-sized, unthreaded, and possibly split in the case of an ~~[[Eccentric (mechanism)\|~~eccentric]] bottom bracket. The chain stays, seat tube, and down tube all connect to the bottom bracket shell.		The '''bottom bracket shell''' is a short and wide tube, relative to the other tubes in the frame, that runs side to side and holds the [[bottom bracket]]. It is usually threaded, often left-hand threaded on the right (drive) side of the bike to prevent loosening by fretting induced precession, and right-hand threaded on the left (non-drive) side. It will be over-sized, unthreaded, and possibly split in the case of an eccentric bottom bracket. The chain stays, seat tube, and down tube all connect to the bottom bracket shell.

	There are a few standard shell widths (68, 70 or 73 mm). Road bikes usually use 68 mm; Italian road bikes use 70 mm; Early model mountain bikes use 73 mm; later models (1995 and newer) use 68 mm more commonly. The shell width influences the [[Q Factor (Bicycles)\|Q factor]] or tread of the bike. There are a few standard shell diameters (34.798 - 36 mm) with associated thread pitches (24 - 28 tpi).



			There are a few standard shell widths (68, 70 or 73mm). Road bikes usually use 68mm; Italian road bikes use 70mm; Early model mountain bikes use 73mm; later models (1995 and newer) use 68mm more commonly. The shell width influences the Q factor or tread of the bike. There are a few standard shell diameters (34.798 - 36mm) with associated thread pitches (24 - 28 tpi).

	==External links==		==External links==
	*[http://www.exploratorium.edu/cycling/frames1.html Science of Cycling: Frames & Materials] from the [[Exploratorium]]		*[http://www.exploratorium.edu/cycling/frames1.html Science of Cycling: Frames & Materials] from the Exploratorium
	*[http://www.sheldonbrown.com/frame-sizing.html Sheldon Brown's "Revisionist Theory of Bicycle Sizing"] - an explanation of the different ways of measuring frame sizes.		*[http://www.sheldonbrown.com/frame-sizing.html Sheldon Brown's "Revisionist Theory of Bicycle Sizing"] - an explanation of the different ways of measuring frame sizes.
	*[http://www.bmeres.com Brano Meres' homemade bamboo mountain bike frame]		*[http://www.bmeres.com Brano Meres' homemade bamboo mountain bike frame]
	*[http://www.63xc.com/scotn/metal.htm Metallurgy for Cyclists] - discusses frame material properties in relation to suitability to frame use		*[http://www.63xc.com/scotn/metal.htm Metallurgy for Cyclists] - discusses frame material properties in relation to suitability to frame use
	*[http://www.bikeforest.com/CAD The Bicycle Forest's BikeCAD program] allows you to design your own frame online.		*[http://www.bikeforest.com/CAD The Bicycle Forest's BikeCAD program] allows you to design your own frame online.


	== See Also ==		== See Also ==

	* [[Forks]]		* [[Forks]]

	== References ==		== References ==

	* [http://en.wikipedia.org/wiki/Bicycle_frame Wikipedia's Bicycle Frame]		* [http://en.wikipedia.org/wiki/Bicycle_frame Wikipedia's Bicycle Frame]

	{{Parts}}		{{Parts}}

	[[Category:Bicycle Parts]]		[[Category:Bicycle Parts]]

Quill: Undo revision 7395 by 62.80.184.178 (Talk)

2010-01-30T21:48:58Z

Undo revision 7395 by 62.80.184.178 (Talk)

← Older revision		Revision as of 21:48, 30 January 2010
Line 1:		Line 1:
	A '''bicycle frame''' is the main component of a [[bicycle]], onto which [[bicycle wheel\|wheel]]s and [[list of bicycle parts\|other components]] are fitted. The modern and most common frame design for an [[upright bicycle]] is based on the [[safety bicycle]], and consists of two [[triangle]]s, a main triangle and a paired rear triangle. This is known as the ''diamond frame''.		A '''bicycle frame''' is the main component of a [[bicycle]], onto which [[bicycle wheel\|wheel]]s and [[list of bicycle parts\|other components]] are fitted. The modern and most common frame design for an [[upright bicycle]] is based on the [[safety bicycle]], and consists of two [[triangle]]s, a main triangle and a paired rear triangle. This is known as the ''diamond frame''.

	In the diamond frame, the main triangle consists of the head tube, top tube, down tube and seat tube. The rear triangle consists of the seat tube, and paired chain stays and seat stays. The head tube contains the [[headset (bicycle part)\|headset]], the interface with the [[bicycle fork\|fork]]. The top tube connects the head tube to the seat tube at the top, and the down tube connects the head tube to the [[bottom bracket]] shell. The rear triangle connects to the rear [[Dropout (bicycle part)\|dropout]]s, where the rear wheel is attached. It consists of the seat tube and paired chain stays and seat stays. The chain stays run parallel to the [[bicycle chain\|chain]], connecting the bottom bracket to the rear dropouts. The seat stays connect the top of the seat tube (often at or near the same point as the top tube) to the rear dropouts.~~[http://www.besttermpapers.org besttermpaper]~~		In the diamond frame, the main triangle consists of the head tube, top tube, down tube and seat tube. The rear triangle consists of the seat tube, and paired chain stays and seat stays. The head tube contains the [[headset (bicycle part)\|headset]], the interface with the [[bicycle fork\|fork]]. The top tube connects the head tube to the seat tube at the top, and the down tube connects the head tube to the [[bottom bracket]] shell. The rear triangle connects to the rear [[Dropout (bicycle part)\|dropout]]s, where the rear wheel is attached. It consists of the seat tube and paired chain stays and seat stays. The chain stays run parallel to the [[bicycle chain\|chain]], connecting the bottom bracket to the rear dropouts. The seat stays connect the top of the seat tube (often at or near the same point as the top tube) to the rear dropouts.

	==Frame tubes==		==Frame tubes==

62.80.184.178 at 16:00, 18 January 2010

2010-01-18T16:00:19Z

← Older revision		Revision as of 16:00, 18 January 2010
Line 1:		Line 1:
	A '''bicycle frame''' is the main component of a [[bicycle]], onto which [[bicycle wheel\|wheel]]s and [[list of bicycle parts\|other components]] are fitted. The modern and most common frame design for an [[upright bicycle]] is based on the [[safety bicycle]], and consists of two [[triangle]]s, a main triangle and a paired rear triangle. This is known as the ''diamond frame''.		A '''bicycle frame''' is the main component of a [[bicycle]], onto which [[bicycle wheel\|wheel]]s and [[list of bicycle parts\|other components]] are fitted. The modern and most common frame design for an [[upright bicycle]] is based on the [[safety bicycle]], and consists of two [[triangle]]s, a main triangle and a paired rear triangle. This is known as the ''diamond frame''.

	In the diamond frame, the main triangle consists of the head tube, top tube, down tube and seat tube. The rear triangle consists of the seat tube, and paired chain stays and seat stays. The head tube contains the [[headset (bicycle part)\|headset]], the interface with the [[bicycle fork\|fork]]. The top tube connects the head tube to the seat tube at the top, and the down tube connects the head tube to the [[bottom bracket]] shell. The rear triangle connects to the rear [[Dropout (bicycle part)\|dropout]]s, where the rear wheel is attached. It consists of the seat tube and paired chain stays and seat stays. The chain stays run parallel to the [[bicycle chain\|chain]], connecting the bottom bracket to the rear dropouts. The seat stays connect the top of the seat tube (often at or near the same point as the top tube) to the rear dropouts.		In the diamond frame, the main triangle consists of the head tube, top tube, down tube and seat tube. The rear triangle consists of the seat tube, and paired chain stays and seat stays. The head tube contains the [[headset (bicycle part)\|headset]], the interface with the [[bicycle fork\|fork]]. The top tube connects the head tube to the seat tube at the top, and the down tube connects the head tube to the [[bottom bracket]] shell. The rear triangle connects to the rear [[Dropout (bicycle part)\|dropout]]s, where the rear wheel is attached. It consists of the seat tube and paired chain stays and seat stays. The chain stays run parallel to the [[bicycle chain\|chain]], connecting the bottom bracket to the rear dropouts. The seat stays connect the top of the seat tube (often at or near the same point as the top tube) to the rear dropouts.[http://www.besttermpapers.org besttermpaper]

	==Frame tubes==		==Frame tubes==

Quill: /* See also */

2009-07-31T22:09:58Z

Quill at 22:09, 31 July 2009

2009-07-31T22:09:34Z

← Older revision		Revision as of 22:09, 31 July 2009
Line 1:		Line 1:
	'''Frame'''		A '''bicycle frame''' is the main component of a [[bicycle]], onto which [[bicycle wheel\|wheel]]s and [[list of bicycle parts\|other components]] are fitted. The modern and most common frame design for an [[upright bicycle]] is based on the [[safety bicycle]], and consists of two [[triangle]]s, a main triangle and a paired rear triangle. This is known as the ''diamond frame''.

			In the diamond frame, the main triangle consists of the head tube, top tube, down tube and seat tube. The rear triangle consists of the seat tube, and paired chain stays and seat stays. The head tube contains the [[headset (bicycle part)\|headset]], the interface with the [[bicycle fork\|fork]]. The top tube connects the head tube to the seat tube at the top, and the down tube connects the head tube to the [[bottom bracket]] shell. The rear triangle connects to the rear [[Dropout (bicycle part)\|dropout]]s, where the rear wheel is attached. It consists of the seat tube and paired chain stays and seat stays. The chain stays run parallel to the [[bicycle chain\|chain]], connecting the bottom bracket to the rear dropouts. The seat stays connect the top of the seat tube (often at or near the same point as the top tube) to the rear dropouts.

			==Frame tubes==
			The diamond frame consists of two triangles, a main triangle and a paired rear triangle. The main triangle consists of the head tube, top tube, down tube and seat tube. The rear triangle consists of the seat tube, and paired chain stays and seat stays.

			===Head tube===
			{{main\|Head tube}}
			The '''head tube''' contains the headset, the bearings for the fork via its [[bicycle fork\|steerer tube]]. In an integrated headset, cartridge bearings interface directly with the surface on the inside of the head tube, on non-integrated headsets the bearings (in a cartridge or not) interface with "cups" pressed into the head tube.

			===Top tube===
			The '''top tube''' connects the top of the head tube to the top of the seat tube. In a traditional-geometry [[racing bicycle]] frame, the top tube is horizontal. In a compact-geometry frame, the top tube is sloped downward toward the seat tube. In a [[mountain bike]] frame, the top tube is almost always sloped downward toward the seat tube. ''See [[Bicycle frame#Road and triathlon bicycles\|Road and triathlon bicycles]] for more information on geometries.'' [[Step-through frame]]s usually have a top tube that slopes down steeply to allow the rider to mount and dismount the bicycle more easily. Alternative Step-through designs include leaving out the top tube out completely, and twin top tubes that continue to the rear dropouts as with the Mixte frame.

			Control cables are routed along mounts on the top tube, or sometimes inside the top tube. Most commonly, this includes the cable for the rear brake, but some mountain bikes and [[hybrid bicycle]]s also route the front and rear derailleur cables along the top tube.

			The space between the top tube and the rider's groin while straddling the bike and standing on the ground is called clearance. The total height from the ground to this point is called the height lever.

			===Down tube===
			The '''down tube''' connects the head tube to the bottom bracket shell. On racing bicycles and some mountain and hybrid bikes, the derailleur cables run along the down tube, or inside the down tube. On older racing bicycles, the [[shifter (bicycle part)\|shift levers]] were mounted on the down tube. On newer ones, they are mounted with the brake levers on the handlebars.

			[[Bottle cage]] mounts are also on the down tube, usually on the top side, sometimes also on the bottom side. In addition to bottle cages, small air pumps may be fitted to these mounts as well.

			===Seat tube===
			The '''seat tube''' contains the [[seatpost]] of the bike, which connects to the saddle. The saddle height is adjustable by changing how far the seatpost is inserted into the seat tube. On some bikes, this is achieved using a [[quick release]] lever. The seatpost must be inserted at least a certain length; this is marked with a ''minimum insertion mark''.

			The seat tube also may have [[braze-on]] mounts for a [[bottle cage]] or front [[derailleur]].

			===Chain stays===
			The '''chain stays''' run parallel to the chain, connecting the bottom bracket shell to the rear [[dropout (bicycle part)\|dropout]]s. When the rear derailleur cable is routed partially along the down tube, it is also routed along the chain stay. Occasionally (principally on frames made since the late 1990s) mountings for disc brakes will be attached to the chain stays. There may be a small brace that connects the chain stays in front of the rear wheel and behind the bottom bracket shell.

			Chain stays can be straight or tapered tubes. Sometimes, on higher-end bikes, they are sculpted to allow clearance for the rear wheel and cranks.

			===Seat stays===
			The '''seat stays''' connect the top of the seat tube (often at or near the same point as the top tube) to the rear dropouts. A style of seat stay that extends forward of the seat tube, below the rear end of the top tube and connects to the top tube in front of the seat tube, creating a small triangle, is called ''Hellenic'' after the British frame builder Fred Hellens who introduced them in 1923.

			The expressions ''single seat stay'', ''mono stay'', or ''wishbone'' all refer to seat stays which merge onto one section before joining the front triangle of the bicycle, thus meeting at a single point. A ''dual seat stay'' refers to seat stays which meet the front triangle of the bicycle at two separate points, usually side-by-side. A single stay can provide stiffer mounting points for cantilever brakes.

			''Fastback'' seat stays meet the seat tube in the back instead of the sides.

			There may be a bridge or brace that connects the stays above the rear wheel and below the connection with the seat tube. Besides additional bracing, this provides a mounting point for rear brakes, fenders, and racks.
			The seat stays themselves may also provide a mounting point for rear rim or disc brakes. Usually, no rear mount is provided on a fixed gear or track frame.

			When the rear derailleur cable is routed partially along the top tube, it is also usually routed along the seat stay. One combination aluminum/carbon fiber racing frame design uses carbon fiber for the seat stays and aluminum for all other tubes. This takes advantage of the better vibration absorption of carbon fiber compared to aluminum.

			===Bottom bracket shell===
			The '''bottom bracket shell''' is a short and wide tube, relative to the other tubes in the frame, that runs side to side and holds the [[bottom bracket]]. It is usually threaded, often left-hand threaded on the right (drive) side of the bike to prevent loosening by [[Precession (mechanical)\|fretting induced precession]], and right-hand threaded on the left (non-drive) side. It will be over-sized, unthreaded, and possibly split in the case of an [[Eccentric (mechanism)\|eccentric]] bottom bracket. The chain stays, seat tube, and down tube all connect to the bottom bracket shell.

			There are a few standard shell widths (68, 70 or 73 mm). Road bikes usually use 68 mm; Italian road bikes use 70 mm; Early model mountain bikes use 73 mm; later models (1995 and newer) use 68 mm more commonly. The shell width influences the [[Q Factor (Bicycles)\|Q factor]] or tread of the bike. There are a few standard shell diameters (34.798 - 36 mm) with associated thread pitches (24 - 28 tpi).


			==See also==
			*[[Bicycle]]
			*[[Bicycle chain]]
			*[[Bicycle fork]]
			*[[Bicycle suspension]]
			*[[Step-through frame]]

			==External links==
			*[http://www.exploratorium.edu/cycling/frames1.html Science of Cycling: Frames & Materials] from the [[Exploratorium]]
			*[http://www.sheldonbrown.com/frame-sizing.html Sheldon Brown's "Revisionist Theory of Bicycle Sizing"] - an explanation of the different ways of measuring frame sizes.
			*[http://www.bmeres.com Brano Meres' homemade bamboo mountain bike frame]
			*[http://www.63xc.com/scotn/metal.htm Metallurgy for Cyclists] - discusses frame material properties in relation to suitability to frame use
			*[http://www.bikeforest.com/CAD The Bicycle Forest's BikeCAD program] allows you to design your own frame online.


	== See Also ==		== See Also ==

Quill: {{Parts}}

2009-07-31T22:03:29Z

← Older revision		Revision as of 22:03, 31 July 2009
Line 8:		Line 8:

	* [http://en.wikipedia.org/wiki/Bicycle_frame Wikipedia's Bicycle Frame]		* [http://en.wikipedia.org/wiki/Bicycle_frame Wikipedia's Bicycle Frame]

			{{Parts}}

	[[Category:Bicycle Parts]]		[[Category:Bicycle Parts]]

Jonathan: /* References */

2007-12-01T05:18:31Z

References

← Older revision		Revision as of 05:18, 1 December 2007
Line 1:		Line 1:
	'''Frame'''		'''Frame'''

			== See Also ==

			* [[Forks]]

	== References ==		== References ==

Jonathan at 19:30, 30 November 2007

2007-11-30T19:30:24Z

← Older revision		Revision as of 19:30, 30 November 2007
Line 1:		Line 1:
	'''Frame'''		'''Frame'''

	[~~[Image~~:~~FrameMeasurements~~.~~jpg\|thumb\|~~Bicycle ~~Measurements]~~]		== References ==

			* [http://en.wikipedia.org/wiki/Bicycle_frame Wikipedia's Bicycle Frame]

	[[Category:Bicycle Parts]]		[[Category:Bicycle Parts]]

← Older revision		Revision as of 22:09, 31 July 2009
Line 50:		Line 50:


	~~==See also==~~
	*[[Bicycle]]
	*[[Bicycle chain]]
	*[[Bicycle fork]]
	*[[Bicycle suspension]]
	*[[Step-through frame]]

	==External links==		==External links==