MODEL : TL045 CRANK MODEL : SX-1 CRANK MATERIAL : FORGED AL-6061-T6 CRANK FINISH : AA BCD : 64MM LENGTH : 165-170MM CHAINRING : 32-42T CHAINRING FINISH AND MATERIAL : HBK,ALLOY GUARD : HBK+CNC,ALLOY CHAIN LINE : 49MM B.B.AXLE : 117MM