Sram GX Eagle XG-1275 10-50t 12 Speed with Sram NX 12 speed chain 126 links

This XG-1275 cassette is an integral part of the SRAM Eagle™ drivetrain system. NO COMPROMISES.
Super wide 10-50t gear range
Speed (CS) 12s
Gearing 10-50t
Cog finish (Cassette) Black
Technology (Cassette) XG

with a Sram NX 12 speed 126 links chain