The SRAM XPLR PG-1231 is a 12-speed cassette designed for gravel riding — a ratio spread optimised for mixed-surface terrain, with the gearing range to handle loaded gravel touring or technical singletrack as well as road sections. Fits the XDR road driver freehub and pairs with SRAM's XPLR AXS rear derailleur and drivetrain.

Highlights

  • 12-speed gravel cassette for SRAM XPLR AXS drivetrains
  • Ratio spread optimised for gravel — road and off-road gearing coverage
  • Requires XDR road driver freehub
  • PowerGlide tooth profiling for consistent shifting
  • Available in multiple ratio options

XPLR gearing

XPLR is SRAM's gravel-specific drivetrain range — the cassette ratios are chosen for the demands of gravel riding: enough top-end for road descents and tight enough spacing in the middle range for comfortable cadence management on rolling terrain, without sacrificing the climbing range needed for loaded or steep sections.

Fit and compatibility

12-speed gravel cassette. Requires XDR road driver freehub — not compatible with standard HG or MTB XD drivers. Compatible with SRAM XPLR AXS rear derailleurs and 12-speed chains. Confirm ratio spread before ordering.

Installation. Service. Compatibility. Find all the documentation needed to set up, use, and maintain your components in the SRAM Service hub.

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Features
  • 12-speed
  • 400% range gives the coverage 1x riders want
  • Cog sizes: 11, 12, 13, 15, 17, 19, 21, 24, 28, 32, 38, 44
  • For use with XPLR 1x rear derailleurs
  • Compatible with Flattop chains
  • For 11-speed road driver bodies

Specifications

Speed (CS) 12s
Gearing 11-44t
Cog finish (Cassette) Nickel Chrome
Technology (Cassette) PG
Cog sizes 11-44t:11-12-13-15-17-19-21-24-28-32-38-44
SKU SRM-CS-PG-1231-D1
Model # CS-PG-1231-D1
Barcode # CS-PG-1231-D1
Brand SRAM