The UK-1 uses regular

The foam insert acts as a cushion between your rim and tyre which prevents damage under normal and aggressive riding condition

Barrel adjuster

the 29" weighs approximately 470gm

Race Face Crank Boots Pair - Turquoise - Small - Alloy Back in Stock The UK-1 uses regularProtect your carbon or alloy cranks from the abuse of trail riding. These are a must have item when using carbon cranks. We use these boots with our Race Face cranks and they have held up extremely well and have done an exceptional job protecting the crank arms. No more worrying about bashing your crank arms on rough trails! To install, remove pedals and slip over the end of your crank arms. Medium Carbon Compatibility: Sixc Cinch Sixc (24mm Spindle)