An elegant solution to protect your cranks and to add some style at the same time. The AMS Crank Defender is designed to work with most carbon cranks in the market.   FEATURES: Impact & scratch protection. Extra protection and added style on the crank arm Fits most carbon and some aluminium cranks (See Below) Durable and strong Light and doesn't absorb water or mud Tight fit to avoid debris between defender and crank arm SPECIFICATIONS: TPU material 18 grams (0.63oz) TESTED COMPATABILITY: SRAM XX1 Eagle SRAM XX1 SRAM X01 Eagle SRAM X01 TRUVATIV Descendant Carbon Also compatible with some aluminium cranks. Tested compatibility with: Shimano XT Shimano SLX Race Face Respond