This PG-1230 cassette is an integral part of the SRAM Eagle drivetrain Ecosystem Wide 11-50t gear range - a perfect fit for any ride, Optimized gear steps across entire range The PG-1230 is the only Eagle cassette designed to be durable enough to withstand the increased demands of E-MTB applications and a perfect solution to heavy-duty use and abuse Compatible with a Shimano splined driver body 11-50t 12sp 11,13,15,17,19,22,25,28,32,36,42,50 BlackUPC/EAN/GTIN: 710845818011