Shimano 105 Bottom Bracket BB-5500 Octalink V1 (8 shallow 9mm deep splines on steel spindle) with English thread (bb shell width: 68mm), sealed cartridge bearings. Optionally available with a spindle length of 109.5mm or 118.5mm. Suitable for older V1 9-speed Shimano road cranksets, e.g. FC-7700. FC-7703. FC-6500. FC-6503. FC-5500. FC-5501. FC-5503. FC-5504. weight: approx. 260g.