Bottom bracket - Revision history

Dustingram: A little clean-up, this needs some work though...

2011-01-27T09:49:01Z

A little clean-up, this needs some work though...

← Older revision		Revision as of 09:49, 27 January 2011
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	'''Bottom Brackets''' are what your [[crank arms]] attach to spin.		'''Bottom Brackets''' are what your [[crank arms]] attach to spin.

	== Types ==		= Types =

	== Cartridge or Sealed ==		== Cartridge or Sealed ==

	All the moving parts are housed within the tubing of a sealed bottom bracket, making them relatively easy to install, but basically impossible to repair. If the axle does not move freely or experiences up and down play, the whole bottom bracket needs replacing.		All the moving parts are housed within the tubing of a sealed bottom bracket, making them relatively easy to install, but basically impossible to repair. If the axle does not move freely or experiences up and down play, the whole bottom bracket needs replacing.

	On a sealed bottom bracket, there is one free cup (which can be removed from the rest of the bracket) and one fixed cup, which is truly fixed in this case. The fixed cup is reverse threaded.		On a sealed bottom bracket, there is one free cup (which can be removed from the rest of the bracket) and one fixed cup, which is truly fixed in this case. The fixed cup is reverse threaded.

	~~'''Installations:'''~~		Identified off the bike by the roughly 1" tubing around the axle.

			===Installations===
	# Install the fixed cup first, into the chain ring side of the bike. Remember it is reverse threaded (Lefty Tighty, in this case). It should go in tightly (bottomed out), then be backed off (loosened) a quarter turn.		# Install the fixed cup first, into the chain ring side of the bike. Remember it is reverse threaded (Lefty Tighty, in this case). It should go in tightly (bottomed out), then be backed off (loosened) a quarter turn.
	# Install the free cup second on the opposite side of the bike. In the case of the sealed bottom bracket, the free cup should also be on as tightly as possible. The threading on the free cup should be [[Righty Tighty, Lefty Loosey]].		# Install the free cup second on the opposite side of the bike. In the case of the sealed bottom bracket, the free cup should also be on as tightly as possible. The threading on the free cup should be [[Righty Tighty, Lefty Loosey]].
	# Re-tighten the fixed cup (Lefty Tighty, again) to ensure a tight, even fit (as per Shimano instructions)		# Re-tighten the fixed cup (Lefty Tighty, again) to ensure a tight, even fit (as per Shimano instructions)

	~~Identified off the bike by the roughly 1" tubing around the axle.~~		==Cup & Cone/ Unsealed==
			These have a lock ring and have either a threaded or [[cotter pin]] axle.
	[[Cup & Cone/ Unsealed]]

	These have a lock ring and have either a [[threaded]] or [[cotter pin]] axle.

	~~[[One Piece]]~~

			==One Piece==
	Commonly found on inexpensive BMX bikes.		Commonly found on inexpensive BMX bikes.

	== References ==		== References ==

	* [http://en.wikibooks.org/wiki/Bicycles/Maintenance_and_Repair/Bottom_Brackets/Bottom_bracket_overhaul Wikibooks bottom bracket overhaul manual]		* [http://en.wikibooks.org/wiki/Bicycles/Maintenance_and_Repair/Bottom_Brackets/Bottom_bracket_overhaul Wikibooks bottom bracket overhaul manual]
	* [http://www.parktool.com/repair/readhowto.asp?id=94 Park Tools cartridge bottom bracket service guide]		* [http://www.parktool.com/repair/readhowto.asp?id=94 Park Tools cartridge bottom bracket service guide]

Dustingram at 10:53, 25 January 2011

2011-01-25T10:53:47Z

← Older revision		Revision as of 10:53, 25 January 2011
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	* [http://www.parktool.com/repair/readhowto.asp?id=94 Park Tools cartridge bottom bracket service guide]		* [http://www.parktool.com/repair/readhowto.asp?id=94 Park Tools cartridge bottom bracket service guide]
	* [http://www.sheldonbrown.com/gloss_bo-z.html Sheldon Brown's Bottom Bracket Definition]		* [http://www.sheldonbrown.com/gloss_bo-z.html Sheldon Brown's Bottom Bracket Definition]

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

71.37.115.168: /* Cartridge or Sealed */

2009-10-22T00:52:35Z

Cartridge or Sealed

← Older revision		Revision as of 00:52, 22 October 2009
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	'''Installations:'''		'''Installations:'''

	# Install the fixed cup first, into the chain ring side of the bike. Remember is reverse threaded (Lefty Tighty, in this case). It should go in tightly (bottomed out), then be backed off (loosened) a quarter turn.		# Install the fixed cup first, into the chain ring side of the bike. Remember it is reverse threaded (Lefty Tighty, in this case). It should go in tightly (bottomed out), then be backed off (loosened) a quarter turn.
	# Install the free cup second on the opposite side of the bike. In the case of the sealed bottom bracket, the free cup should also be on as tightly as possible. The threading on the free cup should be [[Righty Tighty, Lefty Loosey]].		# Install the free cup second on the opposite side of the bike. In the case of the sealed bottom bracket, the free cup should also be on as tightly as possible. The threading on the free cup should be [[Righty Tighty, Lefty Loosey]].
	# Re-tighten the fixed cup (Lefty Tighty, again) to ensure a tight, even fit (as per Shimano instructions)		# Re-tighten the fixed cup (Lefty Tighty, again) to ensure a tight, even fit (as per Shimano instructions)

Jonathan: /* References */

2007-12-13T17:46:43Z

References

← Older revision		Revision as of 17:46, 13 December 2007
Line 25:		Line 25:
	Commonly found on inexpensive BMX bikes.		Commonly found on inexpensive BMX bikes.

	=== References ===		== References ==

	* [http://en.wikibooks.org/wiki/Bicycles/Maintenance_and_Repair/Bottom_Brackets/Bottom_bracket_overhaul Wikibooks bottom bracket overhaul manual]		* [http://en.wikibooks.org/wiki/Bicycles/Maintenance_and_Repair/Bottom_Brackets/Bottom_bracket_overhaul Wikibooks bottom bracket overhaul manual]
	* [http://www.parktool.com/repair/readhowto.asp?id=94 Park Tools cartridge bottom bracket service guide]		* [http://www.parktool.com/repair/readhowto.asp?id=94 Park Tools cartridge bottom bracket service guide]
	* [http://www.sheldonbrown.com/gloss_bo-z.html Sheldon Brown's Bottom Bracket Definition]		* [http://www.sheldonbrown.com/gloss_bo-z.html Sheldon Brown's Bottom Bracket Definition]

206.188.174.1 at 01:11, 13 December 2007

2007-12-13T01:11:53Z

← Older revision		Revision as of 01:11, 13 December 2007
Line 11:		Line 11:
	'''Installations:'''		'''Installations:'''

	# Install the fixed cup first, into the chain ring side of the bike. Remember is reverse threaded. It should go in as tightly ~~as possible~~.		# Install the fixed cup first, into the chain ring side of the bike. Remember is reverse threaded (Lefty Tighty, in this case). It should go in tightly (bottomed out), then be backed off (loosened) a quarter turn.
	# Install the free cup second on the opposite side of the bike. In the case of the sealed bottom bracket, the free cup should also be on as tightly as possible. The threading on the free cup should be [[Righty Tighty, Lefty Loosey]].		# Install the free cup second on the opposite side of the bike. In the case of the sealed bottom bracket, the free cup should also be on as tightly as possible. The threading on the free cup should be [[Righty Tighty, Lefty Loosey]].
			# Re-tighten the fixed cup (Lefty Tighty, again) to ensure a tight, even fit (as per Shimano instructions)

	Identified off the bike by the roughly 1" tubing around the axle.		Identified off the bike by the roughly 1" tubing around the axle.

Jonathan: /* Types */

2007-12-02T02:52:27Z

Types

← Older revision		Revision as of 02:52, 2 December 2007
Line 3:		Line 3:
	== Types ==		== Types ==

	[[Cartridge or Sealed]]		== Cartridge or Sealed ==

			All the moving parts are housed within the tubing of a sealed bottom bracket, making them relatively easy to install, but basically impossible to repair. If the axle does not move freely or experiences up and down play, the whole bottom bracket needs replacing.

			On a sealed bottom bracket, there is one free cup (which can be removed from the rest of the bracket) and one fixed cup, which is truly fixed in this case. The fixed cup is reverse threaded.

			'''Installations:'''

			# Install the fixed cup first, into the chain ring side of the bike. Remember is reverse threaded. It should go in as tightly as possible.
			# Install the free cup second on the opposite side of the bike. In the case of the sealed bottom bracket, the free cup should also be on as tightly as possible. The threading on the free cup should be [[Righty Tighty, Lefty Loosey]].

	Identified off the bike by the roughly 1" tubing around the axle.		Identified off the bike by the roughly 1" tubing around the axle.

Scott@sopobikes: remove link to deleted image

2007-10-18T21:19:10Z

remove link to deleted image

← Older revision		Revision as of 21:19, 18 October 2007
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	~~[[Image:Bottom bracket exploded.jpg\|thumb\|right\|Diagram of a cup & cone bottom bracket]]~~

	'''Bottom Brackets''' are what your [[crank arms]] attach to spin.		'''Bottom Brackets''' are what your [[crank arms]] attach to spin.

Scott@sopobikes: Bottom Bracket moved to Bottom bracket: standard cap.

2007-10-17T05:05:56Z

Bottom Bracket moved to Bottom bracket: standard cap.

← Older revision	Revision as of 05:05, 17 October 2007
(No difference)

Scott@sopobikes: +references

2007-10-16T06:48:52Z

+references

← Older revision		Revision as of 06:48, 16 October 2007
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	=== References ===		=== References ===

			* [http://en.wikibooks.org/wiki/Bicycles/Maintenance_and_Repair/Bottom_Brackets/Bottom_bracket_overhaul Wikibooks bottom bracket overhaul manual]
			* [http://www.parktool.com/repair/readhowto.asp?id=94 Park Tools cartridge bottom bracket service guide]
	* [http://www.sheldonbrown.com/gloss_bo-z.html Sheldon Brown's Bottom Bracket Definition]		* [http://www.sheldonbrown.com/gloss_bo-z.html Sheldon Brown's Bottom Bracket Definition]

Scott@sopobikes: +image

2007-10-16T06:42:33Z

+image

← Older revision		Revision as of 06:42, 16 October 2007
Line 1:		Line 1:
			[[Image:Bottom bracket exploded.jpg\|thumb\|right\|Diagram of a cup & cone bottom bracket]]

	'''Bottom Brackets''' are what your [[crank arms]] attach to spin.		'''Bottom Brackets''' are what your [[crank arms]] attach to spin.