Shimano Dura-Ace 7703 Bottom Bracket
Also a sub for discontinued Ultegra 6500/6503 OL5 bottom brackets. 109.5mm bottom brackets are serviceable and allow for bearing tension adjustments. 22.2mm hollow pipe billet spindle. 5mm deep spline fits crank models 7700/7703, 6500/6503, 5500/5502/5503/5505: 175g/215g.
Item Specifications:
Size:
68mm
70mm
Length:
118.5mm