B Blackstar Retro Guru Aug 16, 2012 #1 Bit confused about bottom brackets. The OEM BB was a XT BB-UN72 with 73mm width, overall 113mm, english thread, square taper The BB tube measures 73 wide by ~35mm bore. Some BB's for sale say 'size = 68 / 73' Will they fit?
Bit confused about bottom brackets. The OEM BB was a XT BB-UN72 with 73mm width, overall 113mm, english thread, square taper The BB tube measures 73 wide by ~35mm bore. Some BB's for sale say 'size = 68 / 73' Will they fit?
cyfa2809 Retrobike Rider Gold Trader Feedback View Aug 16, 2012 #3 73mm is the width of the shell, a 68 wont really work in a 73mm shell but 73 will work in a 68 (with spacers). 113 denotes axle length.
73mm is the width of the shell, a 68 wont really work in a 73mm shell but 73 will work in a 68 (with spacers). 113 denotes axle length.
