Gravel cassettes need range that road gearing can't provide, but they also need to work with your existing XPLR rear derailleur without modifications. The PG-1231 delivers a 10-44T spread specifically designed for SRAM's XPLR AXS ecosystem, giving you a climbing gear that handles steep gravel pitches while keeping tighter jumps between cogs in the middle of the range where you spend most of your time.

The 12-speed layout uses SRAM's XG architecture with a machined steel cluster on the smaller cogs and a pinned aluminum spider carrying the larger cogs. This construction keeps weight reasonable despite the wide range—you're not bolting a mountain bike cassette to your gravel bike and dealing with the weight penalty that comes with it. The X-Range gearing philosophy means the tooth jumps are calculated to minimize that jarring feeling when you shift under power on variable terrain.

Compatibility runs through SRAM's Eagle and XPLR AXS derailleurs, which share the same pull ratio and can handle the 44-tooth large cog. If you're running an XPLR rear derailleur, this cassette drops right in. The XDR driver body requirement matches what's already on most modern gravel wheelsets, so you're likely set there too.... Read More