Gates Carbon Drive CDX Belt
A belt instead of a chain: no grease, no rust, no stretch, and no oily marks on your trouser leg. For single-speed and internally-geared commuters, the Gates Carbon Drive is the ultimate low-maintenance upgrade.
A Gates Carbon Drive replaces your chain with a carbon-fiber-reinforced toothed belt. The carbon cords don't stretch, so the belt holds tension for thousands of miles, and there's nothing to lubricate — you just rinse it clean. No oil means no grime, no rust, and no chain tattoo on your right calf. The CDX (CenterTrack) version has a center groove that tracks ridges on the sprockets, so it resists skipping and tolerates a little misalignment.
The catch is that a belt needs a frame with a split (a breakable rear triangle) to install it, and it only works with single-speed or internally-geared hubs and gearboxes — you can't run a belt over a derailleur cassette. Get the belt, front and rear sprockets, and tension right (Gates' app tension method helps) and it's the cleanest drivetrain you can ride.
Where to buy
Two paths — match your spend to the build. Quality picks last longer and come with real support; affordable picks get you rolling for less. Always confirm fitment, voltage, and connectors for your bike first.
Quality picks
Quality
Gates Carbon Drive
$110
Buy the matched belt-and-sprocket system from the source; use their tooth-count guide to size it to your frame.
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Quality
Universal Cycles
$95
Stocks CDX/CDN belts and sprockets in common sizes; confirm your belt length and sprocket counts before ordering.
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Affordable picks
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Pro tips from our test team
- You can't retrofit a belt to a derailleur bike — it needs a split frame and a single-speed or internally-geared hub.
- Set tension by the book (Gates' Carbon Drive app or a tension tester) — too tight wastes watts, too loose skips.
- It costs more up front than a chain but outlasts several and needs essentially zero upkeep.