SRAM NX Eagle PG-1230 CassetteEagle technology has allowed mountain bikes to push the limits of what was possible. When 1x11 became a thing, many mountain bikers had concerns over whether or not they would have enough gearing to get up steeper hills. Now with the SRAM Eagle, there is an 11-50 gear range so riders can tackle any terrain. The SRAM NX Eagle PG-1230 Cassette is a 12-speed mountain bike cassette with an 11-50t gear range that has optimized gear steps for the entire range and is compatible with a splined driver body instead of the SRAM XD driver. It is the only Eagle cassette that is designed to be durable enough to withstand the increased demands of E-mountain biking. It will be able to take the abuse and heavy-duty use. If you're thinking of making the jump to 12-speed, you'll love the new SRAM NX Eagle PG-1230 Cassette.ARTICLE: SRAM NX EAGLE > FeaturesCompatible with splined driver bodies instead of XD drivers11-50 tooth gear range with optimized gear stepsMeets SRAM's durability standards for E-MTB applicationsSpecificationsCassette Body TypeShimano/SRAM splinedCassette Cogs11-13-15-17-19-22-25-28-32-36-42-50Drivetrain Speeds12Cassette MaterialAluminumWeight- | SRAM NX Eagle Pg-1230 Cassette 11-50, 12 Speed