SRAM to License X-SYNC Technology

Date Jan 7, 2014

Since its successful and celebrated introduction 2 years ago, SRAM’s popular single-ring 1X™ Drivetrains featuring X-SYNC chainrings continue to gain popularity. In an effort to provide consumers more choice – SRAM has licensed this valuable, precision-based technology to two industry partners.


The X-SYNC tooth profile revolutionized mountain bike chain retention.

This December we formally signed two license agreements for the technology, one with Canadian-based Chromag, the other with the Accell Group. Both of these top-tier industry suppliers will be manufacturing their own versions of SRAM’s X-SYNC rings, to be distributed through their own networks. Both suppliers will continue to use and support all SRAM 1X™ Drivetrain components in addition to this license.

This narrow-wide design (also referred to as thick-thin) is an original SRAM technology, designed and engineered to be paired with matching SRAM components to ensure proper function. Imitation rings not manufactured to proper SRAM specifications may result in rapid wear and poor mud clearance, both of which may result in dropped chains.


The chainrings were designed around 11-speed systems but are backwards-compatible with 10-speed chains as well.

SRAM has filed numerous patent applications on narrow-wide / thick-thin tooth geometry. Our German engineering teams invented narrow-wide / thick-thin chain retention for bicycles and we continue to improve on it. We strongly believe consumers deserve both choice and design integrity in the products they purchase. SRAM reserves the right to enforce its intellectual property in all matters relating to X-SYNC.


XX1 was the first place we saw X-SYNC but it will now go beyond.

About Accell: Accell Group N.V. (“Accell Group”) focuses internationally on the mid-range and higher segments of the market for bicycles, bicycle parts and accessories and fitness equipment. Accell has leading positions in the Netherlands, Belgium, Germany, Italy, France, Finland, Turkey, the United Kingdom and the United States. Accell Group’s best known brands are Batavus (NL), Sparta (NL), Loekie (NL), Ghost (DE), Haibike (DE), Hercules (DE), Winora (DE), Raleigh and Diamondback (UK, US, CA), Lapierre (FR), Tunturi (FI), Atala (IT), Redline (US) and XLC (international). For more information visit:

About Chromag Bikes: Chromag is a manufacturer of high end machined bicycle components based in Whistler, British Columbia, Canada. In addition to a full range of quality components, Chromag also manufactures an extensive line of steel hardtails. Being a smaller company gives Chromag the ability to move quickly and bring the most relevant components to market with a heightened sense of detail and creativity. For more information visit:

Does this signal a change for current aftermarket makers of narrow-wide rings, or can they somehow get around SRAM’s patents? In any case it’s good to see this technology put to use by more companies.

Posted in: News


heckler  - Jan. 8, 2014, 9:34 p.m.

Besides, X-Sync is already taken by mobile file sharing and photography.


heckler  - Jan. 8, 2014, 9:32 p.m.

It's old technology in a new application. Free market to use the concept, although I'm sure SRAM's tooth profile is unique and licencable. My RF ring's teeth don't look like a SRAM's though.


jdt  - Jan. 8, 2014, 10:25 a.m.

Good for Chromag!


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