The XG-1275 is the workhorse of SRAM's classic Eagle cassette lineup — it's the same 12-speed, wide-range platform that trickled down from XX1 and X01, built to a price point that makes sense for the everyday trail rider. If you're running a mechanical Eagle drivetrain (NX, GX, X01, or XX1 shifter and derailleur) and it's time to replace a worn cassette, this is the one most riders end up on. It also meets SRAM's durability requirements for E-MTB applications , so it's a legitimate option for pedal-assist bikes too.

Construction is where GX diverges from the pricier Eagle cassettes. FULL PIN technology uses eleven lightweight, stamped cogs held together with 123 high-strength stainless steel pins , with an aluminum large cog for the 50T or 52T. That's different from the machined-from-billet X-DOME construction on X01 and XX1, and it's the reason the GX cassette comes in around 100 grams heavier than XX1. The tradeoff is cost — you're getting the same Eagle shift ramps and the same tooth profiles at roughly a third of the flagship price, with durability that's arguably better for riders who chew through drivetrains.

Two range options cover most use cases. The 10-50T progression runs 10-12-14-16-18-21-24-28-32-36-42-50, and the 10-52T runs 10-12-14-16-18-21-24-28-32-36-42-52 — same eleven smaller cogs, just a bigger bailout gear on the 10-52. The 10-50 gives you a 500% range with a tighter final jump (42-to-50), which some riders prefer for cadence consistency. The 10-52 stretches to 520% for steeper sustained climbs. Both drop onto an XD driver body — no XDR, no HG, no adapters. If your wheel is running a Shimano HG freehub, you'll need to swap the driver before this cassette will thread on.... Read More