SRAM introduces direct-mount X-SYNC chainrings

SRAM introduces direct-mount X-SYNC chainrings

New 1x11 rings increase gear range, reduce weight

SRAM's direct-mount chainrings for its 1x11 mountain groups increase gearing options and decrease weight

Courtesy

Josh Patterson

Published: December 16, 2014 at 5:27 pm
SRAM's direct-mount chainrings for its 1x11 mountain groups increase gearing options and decrease weight - Courtesy
The new SRAM direct-mount X-SYNC chainrings are compatible with XX1, X01 and X1 - Courtesy
SRAM will offer its direct-mount X-SYNC chainrings in even tooth counts from 26-40t - Courtesy

SRAM is rolling out an expansive range of direct-mount chainrings for its 1x11 speed drivetrains.

These CNC-machined aluminum direct-mount rings offer two important benefits over the four-bolt design employed thus far on XX1, XO1 and X1 cranks: increased gearing range and decreased weight.

Curiously, SRAM opted to use two different bolt circle diameters for its three 11-speed mountain groups. The top-tier XX1 group uses a 76mm BCD, allowing riders to go as low as a 28t chainring. However, the 94mm BCD used on X01 and X1 limits the smallest chainring size to 30t.

The new sram direct-mount x-sync chainrings are compatible with xx1, x01 and x1: - Courtesy

The new direct-mount X-SYNC rings are compatible with all of SRAM's 1x11 mountain groups

This direct mount chainring option is compatible with XX1, X01 and X1-level cranksets and allows riders to select from a much broader range of tooth counts — everything from a climb-friendly 26t all the way up to a quad-killing 40t ring.

The second important benefit of SRAM’s new direct-mount rings is a reduction in weight. The claimed weight savings of the direct-mount rings ranges from 25-50g, depending on chainring size.

One downside to this direct-mount approach is that — since the chainring bolts directly onto the crankarm spindle — the chainrings must be offered in dedicated versions for cranksets with 24mm (GXP) and 30mm (BB30) spindles in order to get achieve the proper chainline.

SRAM will offer its direct-mount x-sync chainrings in even tooth counts from 26-40t : - Courtesy

To view a compatibility chart for SRAM’s new direct-mount chainrings click here.

Claimed weights for GXP chainrings: 61g (26t), 66g (28t), 68g (30t), 71g (32t), 76g (34t), 91g (36t), 101g (38t), 119 (40t)

Claimed weights for BB30 chainrings: 52g (26t), 58g (28t), 61g (30t), 66g (32t), 71g (34t), 82g (36t), 94g (38t), 106g (40t)

Pricing: US$99 / £75 / AU$ TBA

Availability: 30t, 32t, 34t chainrings are available now; 26t, 28t, 36t, 38t, 40t rings will be available in April 2015.

Visit www.sram.com for more information.

Josh Patterson

Contributor

Josh Patterson is a BikeRadar contributor and former technical editor. He has spent most of his career working in the cycling industry as an athlete, mechanic and journalist. He holds a master's degree in journalism and has more than 20 years of experience as a cyclist and 12 years of experience riding and writing for BikeRadar, Cyclingnews, Cycling Weekly, Dirt Rag, RoadBikeReview and Outside Magazine. A native of the Flint Hills of Kansas, Josh was a pioneer in the gravel cycling movement, having raced the first Unbound 200 and many other gravel events around the globe. He considers himself a cycling generalist and enjoys road, gravel and mountain biking in equal measure. When not traveling for work, he can be found exploring the singletrack and lonely gravel roads that surround his home in Fort Collins, Colorado. In addition to his love of cycling, Josh is an enthusiastic supporter of brunch, voting rights and the right to repair movement.
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