Whool 104BCD 32T/34T/36T Ultralight A7075 Alloy MTB Bike Bicycle Narrow Wide Chainring Oval Round Chainwheel Cycle Crankset Please Confirm Your Crank BCD Is 104MM Material:A7075-T651 Alloy Stiff 4mm plate thickness and I-beam construction transfer loads without flexing Compatible for 9, 10 and 11 speed