Sram Red AXS XPLR XG-1391

13Speed Innovation. Uncompromised Range.

The Sram XG-1391 features a massive 10-46T gear spread, offering a whopping 460% gear range. Built using Sram’s legendary engineering, the largest cogs are constructed from lightweight aluminum, while the smaller, high-torque gears are precision-machined from a single block of chromoly steel. Optimized specifically for modern Full Mount (Transmission-style) setups, the XG-1391 features meticulously mapped shifting ramps that allow you to shift flawlessly under full load; even when you're grinding up a loose, out-of-the-saddle 20% gravel wall.

Why the XG-1391 is a Gravel Revolution:

• Revolutionary 13Speed Spacing: By adding a 13th cog, Sram has eliminated the frustratingly large "cadence gaps" found in traditional 1x setups. You get smooth, progressive steps right where you need them on rolling gravel flats, plus a massive 46T bail-out gear.

• Full Mount Optimization: Designed to pair perfectly with Sram XPLR Full Mount rear derailleurs. It utilizes precise shift-mapping to ensure that the chain is always guided smoothly from cog to cog, practically eliminating skipped shifts and drivetrain noise.

• Lightweight Multi-Material Construction: Offers the perfect balance of elite weight savings and industrial durability. The steel cluster ensures thousands of miles of crisp shifting, while the aluminum low gears keep the rotating mass of your rear wheel to an absolute minimum.

• Massive 460% Gear Range: Tackle alpine mountain passes, techy singletrack, and high-speed pacelines on the same ride. The 10T cog lets you push the pace on fast descents, while the 46T makes the steepest gravel gradients manageable.

• X-Dome Technology Provenance: Inheriting design cues from Sram’s top-tier mountain bike cassettes, the open architecture allows mud, grit, and trail debris to easily shed through the cogs, maintaining perfect shifting in the worst track conditions.

• Universal XDR Driver Interface: Mounts seamlessly to standard XDR driver bodies, making it widely compatible with a massive array of modern gravel and road wheelsets.

Technical Specifications:

• Speeds: 13Speed (XPLR AXS System Specific)

• Gear Range: 10-46T (10, 11, 12, 13, 15, 17, 19, 21, 24, 28, 32, 38, 46)

• Range Percentage: 460%

• Driver Body Interface: XDR

• Recommended Chain: Sram Flattop 13Speed

• Technology: X-Dome / Shifting mapped for Full Mount

The Alegro Perspective: 1x Perfection. For years, gravel riders had to choose between the simplicity of a single chainring or the tight gear steps of a double (2x) setup. This 13Speed cassette completely ends that debate. When mounted to an elite gravel machine like the Scott Addict Gravel, it gives you an incredibly quiet, drop-free drivetrain that climbs like a mountain bike but still lets you fine-tune your rhythm on the tarmac. It is a stunning piece of modern cycling engineering.

Thirteen Gears. Zero Compromises. Rewrite your Limits with Sram XPLR.