Harris Cyclery» Reference Archives – Harris Cyclery Blog http://blog.harriscyclery.com A small, service oriented bike shop in West Newton, MA Thu, 02 Sep 2010 15:20:49 +0000 en hourly 1 Shimano UN54 Cartridge Bottom Brackets Relative Chainline http://blog.harriscyclery.com/relative-chainline-bottom-brackets/ http://blog.harriscyclery.com/relative-chainline-bottom-brackets/#comments Tue, 15 Dec 2009 19:23:09 +0000 kevin http://blog.harriscyclery.com/?p=117 Here are some measurements I took from some of the square taper cartridge bottom brackets we carry. The drive side length is measured from the edge of the bottom bracket shell to the very end of the spindle. These measurements should be good enough relative to each other for chainline adjustment, but I wouldn’t use this chart to compare with bottom brackets from other manufacturers, which may have different taper lengths.

Bottom BracketOverall LengthDrive Side Length
Sugino/Tange 68-103103mm18mm
Shimano UN54 68-107108mm20mm
Shimano UN54 68-110111.5mm20mm
Shimano UN54 68-113114mm22.5mm
Shimano UN54 68-115115.5mm23.5mm
Shimano UN54 68-118118.5mm25mm
Shimano UN54 68-122123mm28mm
Shimano UN54 68-127128mm30mm

Cartridge Bottom Brackets from Harris Cyclery

]]> http://blog.harriscyclery.com/relative-chainline-bottom-brackets/feed/ 2