Shimano Ultegra SM-BB72-41B Bottom Bracket color:black:#0e0e0e 100% organic cotton

100% organic cotton

StretchVent gaiters with gripper elastic

Style: "Jean" style pockets and slight flare design

and seamless construction ensure lasting comfort

Sleeves: Long sleeves

Shimano Ultegra SM-BB72-41B Bottom Bracket color:black:#0e0e0e 100% organic cottonFEATURES of the Shimano Ultegra SM BB72 41B Bottom Bracket Lightweight maintains efficiency Combined with FD 6800 chain guide design to reduce chain drop Optimum power transfer Dura ace proven 4 arm design: Same stiffness and lighter weight 14g lighter weight and half the friction of the SM BB6700, while maintaining the same durability Variety choice of gearing: 53 39T 52 36T 50 34T 46 36T Press Fit BB shell width_86mm Hollowtech II BB_press fit type