Race Face Narrow Wide Chainrings - 9/10/11/12 Speed Size:104mm x 38T and optimal size

and optimal size

The sole flex is torsionally stiff enough for aggressive skate skiing but still smooth enough for nuanced classic skiing

while boot gaiters and the high waist of the bib design provide added coverage on powder days

This kit has everything you need to clean and maintain your hydration reservoir and delivery system

Shimano's Dura-Ace Bottom Bracket is perfect for Shimano's Dura-Ace crankset

Race Face Narrow Wide Chainrings - 9/10/11/12 Speed Size:104mm x 38T and optimal sizeSame chain retention, less noise and cleaner performance! NEW removed ridges so it is easier to keep the ring looking clean NEW tooth profile to run quieter, and cleaner Narrow Wide tooth profiling ensures ultimate chain retention Stiff 4mm plate thickness transfer loads without flexing 7075 T6 aluminum, aerospace grade strength Laser etched graphics Compatible with 9, 10, 11 and 12 speed ArmxBCD: 4x104 4 bolt