Chains

Road Chain Buying Guide

The chain is your drivetrain's most consumable part. Width must match your speed count, and regular replacement protects your cassette and chainrings from premature wear.

Speed Compatibility

Chain width decreases with speed count. An 11-speed chain is narrower than a 10-speed and won't work on a 10-speed drivetrain (it'll skip). Going the other direction — a wider chain on a narrower drivetrain — causes rubbing and poor shifting. Match the chain to your cassette speed count.

Brand Cross-Compatibility

8/9/10-speed: Shimano, SRAM, and KMC chains are fully interchangeable. 11-speed: Shimano and SRAM chains work on either system. 12-speed: Shimano and SRAM are NOT cross-compatible — different roller widths. Campagnolo chains work best with Campagnolo drivetrains at all speed counts. KMC makes chains for all systems and is often the best value.

Connecting Methods

Quick links (Shimano calls them "quick link", SRAM "PowerLock", KMC "Missing Link") snap together without tools and make removal easy. Shimano connecting pins are pressed in — reliable but single-use. Most riders prefer quick links for convenience.

Coatings & Durability

Standard nickel-plated chains last 2,000-3,000 miles with proper lubrication. Premium coatings — Shimano SIL-TEC, SRAM Hard Chrome, KMC Diamond — reduce friction and extend life by 20-30%. Ceramic-coated aftermarket chains (CeramicSpeed UFO) are for marginal gains chasers: 1-2W savings at race pace.

Maintenance

Check chain wear every 500 miles with a chain checker. Replace at 0.5% stretch on 12-speed, 0.75% on 11-speed, 1.0% on 8-10 speed. A £15 chain replaced on time saves a £60 cassette. Clean and lube regularly — dry lube for summer, wet lube for winter, wax for the obsessive.