Product Description:
Stiff I Beam Crank Arm Available in 175mm or 170mm 44-32-22 All Aluminum Rings w/Aluminum Chainring Bolts 104mm/64mm Bolt Circle Diameter Patented Super Fluid Drive Shifting Ramps ISIS Splined Weight - 640 grams
Product Description:
Switch between 31.8mm and 28.6mm with the change of a Shim Top Swing Top Gear - 42 Tooth Top Low Max Capacity - 20 Tooth Top Middle Min Capacity - 8 Tooth Shimano Compatible Weight - 168 grams