The Thomson X4 is the leader in strength and stiffness
7g (Rear Regular Mount w/o pads)
BlackChili Compound for class-leading grip and low rolling resistance
Available in multiple gearing options
Caffélatex flow characteristics change on a microscopic level without the headaches of valve-clogging glitter
Shimano Dura-Ace FC-R9100 11 Speed Crankset Size:165mm The Thomson X4 is theThe choice of the world's best climbers, sprinters and time trialists, the Shimano Dura Ace FC R9100 11 Speed Crankset drops weight while maximizing power transfer. The design, and its iconic look, is adapted for race specific disc brake systems while still offering a wide range of gearing and crank arm length options. Specifications Lengths: 165mm, 167. 5mm, 170mm, 172. 5mm, 175mm Combinations: 55 42T, 54 42T, 53 39T, 52 36T, 50 34T Chainline: 43.