MODEL : TL046 CRANK MODEL : SX-2H/B CRANK MATERIAL : FORGED AL-6061-T6 CRANK FINISH : AA BCD:64MMLENGTH :165-170MM CHAINRING : 34-48T CHAINRING FINISH AND MATERIAL : HBK,ALLOY GUARD : HA,ALLOY CHAIN LINE : 45.5MM B.B.AXLE :108MM