Thanks to its “horizontal parallelogram” design, X-Horizon can keep the chain gap the same across all 11 gears.

By taking vertical movement out of the equation, this design doesn’t just make shifting faster—it reduces shift force and eliminates ghost shifting. Roller Bearing Clutch technology reduces bounce and chain slap. Cage Look technology makes wheel removal and installation easier than ever before. Paired with the X01 shifter, the X-Horizon RD forms the backbone of X-Actuation technology: the key to totally smooth shifting action.


Cage Lock - With Cage Lock technology in the rear derailleur, wheel removal and installation—as well as chain installation—becomes faster and simpler. Just pushing the cage forward to create slack and lock it into place.

Roller Bearing Clutch -  rear derailleurs deliver maximum drivetrain stability—even through the most punishing terrain. With Roller Bearing Clutch technology, derailleur bounce and chain slap are eliminated without sacrificing precision.

X-Actuation - Developed specifically for SRAM 1x, X-Actuation keeps shifting sharp and consistent across the entire cassette.

X-Horizon - The X-Horizon rear derailleur’s ‘straight parallelogram’ design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force. For quicker, more exact shifting, the large upper pulley offset design maintains a constant chain gap across all gears.

X-Sync - SRAM X-Sync 1x chain rings provide the highest level of performance and durability. The SRAM X-Sync tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-Sync chain rings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-Sync rings are an integral part of the SRAM 1X drivetrain.


Large upper pulley offset automatically adjusts chain gap

X-Horizon design reduces shift force and ghost shifting

12-tooth X-Sync pulley wheels

Sealed cartridge bearings


Speeds: 11-speed

Material: Carbon Fiber Or Aluminum Outer Cage

Weight: 250g

Colors: Red, Black

Compatibility: 1x11 X-Actuation

Bearings: Sealed Cartridge Bearings

Cage Sizes: Long

Pivot Design: Horizontal Parellelogram Design

Max Tooth: 42t

Pulleys: 12-tooth X-Sync Pulley Wheels

Technology Highlight(s): X-Actuation, X-Horizon, X-Sync, Roller Bearing Clutch, Cage Lock


Dirt Rag Mag

SRAM X01 and SRAM Guide RSC | Editors Choice 2014 | Dirt Rag

“The age of single-chainring drivetrains is here, and the best value in weight to performance is unequivocally SRAM’s mid-level X01 group. The weight and performance is so close to the top-tier XX1 set and I’ve never wanted more than what X01 delivers. It looks great, provides perfect performance, and carries a decent price tag.” View Article

by Mike Cushionbury,, November 18, 2014

Enduro Magazine

SRAM 1x11 drivetrain | long-term test | Enduro Magazine

The German Enduro Magazine published a long-term test about the SRAM 1x11 drivetrain. With each of these group sets having ticked off several thousand kilometers on their test fleet, they thought it was time to see how they were faring. The 1x11 drivetrains have been out on all terrains for serious testing - from the Bavarian mountains to the flowing trails around Stuttgart, and not forgetting the filthy wet lines of Scotland. View Article

by Christoph Bayer,, September 24, 2015

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