SRAM RED XPLR Crank Arm AssemblySRAM RED XPLR CRANK ARM ASSEMBLY Were not ones to rest on our laurels. So when we found ways to make our lightest and stiffest crankarms even lighter, we went for it. A new process drops further grams from our hollow carbon arms, and to stay on top of current fit trends weve added our first carbon 160mm crankarm length option. SPECIFICATIONS Speeds n a BB Compatibility All SRAM Road DUB BBs, All SRAM Road WIDE DUB BBs Chainring Size n a Crank arm