SRAM XG-1251 D1 XPLR Cassette 12 Speed 10-44T Silver - Gravel Bike AXS Gearing with| Cycling Gears Hub

Upgrade your gravel or adventure bike with the SRAM XG-1251 D1 XPLR Cassette, a purpose-built 12 speed cassette designed specifically for drop bar gravel riding. Part of SRAM's XPLR collection, which brings together SRAM, RockShox, and Zipp components to celebrate a new era of gravel and adventure cycling, the XG-1251 delivers the wide range coverage and precise electronic shifting performance that modern 1x gravel drivetrains demand.

X-Range Gearing and 440 Percent Range:
The SRAM XG-1251 features X-Range gearing, engineered to provide riders with more usable range and a smoother, more consistent gear progression throughout the cassette. With a 10-44T configuration spread across 12 cogs, this cassette delivers an impressive 440 percent gear range, giving gravel riders the bailout gears needed for steep, sustained climbs while still maintaining tight enough jumps at the top end to keep pace during fast paced road sections. The cog progression of 10-11-13-15-17-19-21-24-28-32-38-44 ensures smooth, predictable shifting across the entire range, so you are always in the right gear no matter the terrain.

Optimized for Electronic Shifting:
Every cog on the SRAM XG-1251 features shift ramps and tooth profiling specifically optimized for electronic AXS shifting, resulting in fast, smooth, and precise gear changes every time. This makes the cassette an ideal match for SRAM's wireless XPLR drivetrain ecosystem, delivering the kind of consistent, reliable shifting performance that gravel racing and long-distance adventure riding demand.

MINI CLUSTER Construction:
This cassette uses SRAM's MINI CLUSTER technology, a construction method that prioritizes both light weight and long-term durability. Weighing approximately 412 grams, the XG-1251 is one of the lighter cassettes in the XPLR lineup, helping to reduce rotating weight for improved overall efficiency, while still offering more usable range than many competing gravel cassettes on the market. The cogs are finished in nickel chrome for added corrosion resistance, making this cassette well suited for gravel riding through wet conditions, stream crossings, and harsh winter roads.

Compatibility:
The SRAM XG-1251 is designed exclusively for use with SRAM's 12 speed AXS XPLR 1x rear derailleurs, including models from the Rival, Force, and Red AXS XPLR groupsets. This cassette requires an XDR driver body for installation, meaning a standard road XD or Shimano HG freehub will not accept it, so riders should confirm their hub compatibility before purchasing. It is also compatible exclusively with SRAM Flattop chains, and will not work with mechanical SRAM road groups, SRAM Eagle mountain bike drivetrains, or Shimano drivetrain systems. Riders using the newer 13 speed XPLR E1 platform should note that this cassette is not compatible with that system, which instead uses the XG-1371 or XG-1351 cassettes.

Installation:
Installation is straightforward, with the cassette sliding directly onto a compatible XDR driver body and securing with a standard lockring torque. It pairs with any Flattop-compatible chain within the SRAM road chain catalog, making setup simple for both home mechanics and professional bike shops.

Ideal Use Cases:
This cassette is ideal for gravel cyclists, adventure riders, and cyclocross racers who want a dedicated wide-range 1x drivetrain solution without compromising on shifting precision or weight. It is particularly well suited for riders using SRAM's electronic AXS XPLR groupsets who want reliable climbing gears for loaded gravel routes, combined with tight enough top-end gearing to remain competitive on paved sections and fast gravel descents.

Key Specifications Summary:
Brand: SRAM
Model: XG-1251 (D1, XPLR)
Product Type: Cassette
Number of Speeds: 12 Speed
Gear Range: 10-44T (440 Percent Range)
Cog Configuration: 10-11-13-15-17-19-21-24-28-32-38-44
Color: Silver
Cog Finish: Nickel Chrome
Cassette Body Compatibility: SRAM XDR Driver Body
Chain Compatibility: SRAM Flattop Chains Only
Drivetrain Compatibility: SRAM 12-Speed AXS XPLR 1x (Rival, Force, Red AXS)
Weight: Approximately 412 grams
Technology: X-Range Gearing, MINI CLUSTER Construction
Intended Use: Gravel, Adventure, and Cyclocross Riding

The SRAM XG-1251 D1 XPLR Cassette delivers a wide 440 percent gear range, lightweight MINI CLUSTER construction, and precise electronic shifting performance, making it an excellent choice for gravel and adventure cyclists running SRAM's 12-speed AXS XPLR drivetrain system.