SRAM XX1 Fat Bike Carbon Chainset - GXP - 28T - 175mm Crank ArmSRAM XX1 Fat Bike Carbon Chainset GXP 28T 175mm Crank Arm This fat bike chainset features a carbon fibre crankarm construction, which allows it to deliver fantastic stiffness when climbing and an overall lower drivetrain weight when descending. SRAM has also gone a step further with this version by equipping it with a foam core for additional weight reductions, yet it remains durable enough for any fat bike adventure. Coming kitted out with a direct