Type : Rear DerailleurComponents : DerailleursGears : 12 SpeedModel Number : SENSAH XRXTotal Capacity : 12 SpeedMaterial : SteelIf you need to send 2 packages to reduce the risk, please pay 0.5 US dollars for shipping linkShipping link Click here !SENSAH XRX 12 SPEED GROUPSETFEATURES:Compatible: 12 Speedit includes:SENSAHXRX12 speed shifter lever(right,with inner cable)SENSAHXRX12 Speed Rear Deparair, Long CageSUNSHINE-SZ12s Cassette: 11-50t or 11-52tKMC X12 12 Speed chain118 links with chainlinkPROWHEEL CLAW 104BCD Crankset 170/175mm 32/34/36/38tPROWHEEL BSA Bottom Brackset 68/73mmCrankset (PROWHEEL)30/32/34/36/38TCrank Arm Length:170/175mmWeight: 780g (5%)Cassette (SUNSHINE )Compatible with old Shimano 9-11s freehub11-50T 11-52TWeight (5%): 11-50T:610g 11-52T:730gShifte(SENSAH XRX)1 x 12SpeedWeight (5%): 135gRear Derailleur (SENSAH XRX)12SpeedWeight: 310g (5%)Bottom Bracket (PROWHEELBSA)Type:EnglishShell width:68/73mmWeight: 110g (5%)Chain (KMC X12)Link: 118 LinksWeight: 260g (10%)SENSAH XRX 1 x 12 Speed GroupsetBrand: SENSAHModel: XRX 1x12Compatible: cassette 46T 50T 52TRear DerailleurWeight: 307Innovative low-key design makes riding more aggressive1:1 technology can achieve accurate and smooth shift performanceCage lock claw technology makes everything faster and adds adjustable spring elasticity. Rear dial stabilizer eliminates chain flappingAll aluminum parts, upgraded hidden rear dialFinger shifterWeight: 135Accurate and consistent shift performanceBidirectional releaseAluminum downshift handle with anti-skid designBeautiful appearance,PROWHEEL 104BCD 175mm 170mm Cranks 30/32/34/36/38TBrand:ProwheelMaterial: aluminum alloySpecification: BCD 104mmColor: BlackCrank170mm/175mmSprocket30T/32T/34T/36T/38T