Chainrings

Chainring Buying Guide

The chainring determines your gearing ratio alongside the cassette, and narrow-wide tooth profiles have made chain guides largely optional on 1x setups. Choosing the right tooth count and mount type is straightforward once you know what your crankset uses.

Tooth Count

The chainring tooth count sets where your gear range sits. A 32T chainring is the default for trail riding — it balances climbing and flat-ground speed. 30T is better for steep, technical climbing (enduro, steep trails). 34T suits faster, less steep riding and XC. 28T is extreme climbing territory (ultra-steep alpine riding). A 2T change in chainring size is roughly equivalent to one gear shift, so the choice isn't dramatic — but it affects every gear in your range.

Mount Types

Direct mount chainrings attach to a splined interface on the crank arm — SRAM DUB, Shimano Direct Mount, Race Face Cinch, and Hope all have proprietary spline patterns. BCD (Bolt Circle Diameter) chainrings bolt to a spider with 4 or 5 bolts — 104mm BCD is the most common MTB standard. You must match the mount type to your crankset. Wolf Tooth and absoluteBLACK make chainrings in almost every mount pattern, which makes them popular for mixing brands.

Narrow-Wide Teeth

Narrow-wide chainrings have alternating thick and thin teeth that match the chain's alternating inner and outer plates. This interlocking keeps the chain on the ring without a chain guide on most terrain. Every quality 1x chainring uses narrow-wide profiling. Oval (non-round) chainrings from absoluteBLACK and Wolf Tooth modulate the pedalling force through the stroke — some riders swear by them for climbing traction, others notice no difference. They're worth trying if you're curious.

Materials

Alloy chainrings (7075 aluminium) are light, stiff and relatively affordable. Steel chainrings last 2-3x longer but weigh more. For most riders, alloy is the right choice — chainrings are a consumable item and the weight saving over steel is noticeable (30-50g). If you ride in extremely abrasive conditions (sand, grit) and burn through alloy rings, stainless steel options from Race Face, Wolf Tooth and Hope will save money long-term.