SHIMANO Dura Ace BB7700 70x109.5mm Italian V1 Spline BB
Shimano BB-7700 Dura-Ace Double bottom brackets. Features: BB-7700 has a 22mm splined, hollow spindle; fits FC-7700/FC-7703/FC-6500/FC-6503/FC-5500/FC-5501/FC-5503/FC-5504 cranks Use TL-UN74 (TL6028) installation tool Track BB-7710 has a 22mm, splined, hoow spindle, cartridge bearings, and steel lockring