Shimano Dura Ace CS R9100 11 Speed Cassette - 12-25T Wearable Lights efficiency-oriented design

efficiency-oriented design

TPR wrist strap for adjustable and secure fit

7 bar (85-110 PSI)

the GXP family model reduces friction and weight

with technology to keep your chain perfectly in place and give smooth and reliable shifting anytime

Shimano Dura Ace CS R9100 11 Speed Cassette - 12-25T Wearable Lights efficiency-oriented designShimano Dura Ace CS R9100 11 Speed Cassette 12 25T The Shimano Dura Ace CS R9100 cassette is engineered for riders who prioritise tight gearing, instantaneous shifting, and absolute drivetrain efficiency. Designed for high speed road racing and fast paced riding, this close ratio cassette allows finer cadence control, helping maintain power output and rhythm during sustained efforts and aggressive accelerations. Built around Shimano Hyperglide EV