Features: •Outboard bottom bracket bearing cups for use with 105 FC-5700 and FC-5703 HollowTech II chainsets •Minimal bearing interface gives superbly smooth rolling •Required for installation of FC-5700 and FC-5703 chainset •British threadRead More...
how do i measure the size of a BB from the frame - if i havent got an old BB to measure????
CRC Replies:
To get the correct BB size you will need to measure the Width of the bottom bracket on the frame. It will be 68mm or 73mm on a Mountain Bike. The axle length depends on the cranks, as a guide, most modern ISIS cranks use a 113mm but there are exceptions