Chainrings

(67 products)

Chainrings for road, gravel and MTB cranks, in round and oval profiles, spider-mount and direct-mount designs, plus the bolt kits to fit them. Use the guide below to match bolt circle diameter, speed and mounting standard to your crank, and check the compatibility details on each product page before ordering.

Read more: matching BCD, speed and mounting standard to your crank

Getting BCD and bolt count right

Bolt circle diameter is the measurement that decides whether a ring physically fits your crank, and it is not interchangeable. Most current 11 and 12-speed road cranks with a four-arm spider use 110 BCD, while older and some third-party cranks use 130 BCD with five bolts. Count your bolts and measure before ordering.

Direct mount or spider mount?

Direct-mount rings bolt straight onto the crank arm with no separate spider, which saves weight and simplifies the interface. Most modern MTB 1x drivetrains use it, and many direct-mount rings come in more than one offset. Offset matters: it sets the chainline, and the wrong one will shift poorly across the cassette.

Are oval rings worth trying?

Oval rings vary the effective gear through the pedal stroke, easing the dead spot at the top and loading the part of the stroke where you make power. Riders either get on with them quickly or do not, so give them a few weeks. Many allow some clocking adjustment to suit your pedalling, and they tend to suit riders who climb seated at a steady cadence.

Do not forget the bolts

Chainring bolts are not universal and a single versus double setup needs different lengths. Steel bolts are tough and inexpensive, alloy bolts save a few grams, and dedicated short bolts are needed for many 1x conversions. Torque matters here: overtightening alloy bolts strips them, so use a torque wrench.

Not sure which chainring fits your crank? Ask TBA Guide, our chat assistant.

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Frequently Asked Questions

How do I know which BCD chainring I need?

Measure the bolt circle diameter on your existing crank and count the bolts. Current Shimano 11 and 12-speed road cranks are 110 BCD with four bolts, older road cranks are often 130 BCD with five, and SRAM road uses 107 BCD on some models. BCD is not interchangeable, so a 130 BCD ring will not mount on a 110 BCD crank regardless of tooth count.

Are oval chainrings better than round ones?

Oval rings smooth the dead spot at the top of the pedal stroke and load the downstroke more, which some riders find helps on sustained climbs. The evidence is mixed and the response is individual, so treat it as a preference rather than a guaranteed gain. Look for rings that allow clocking adjustment so you can tune them to your stroke.

Can I use an 11-speed chainring with a 12-speed chain?

Usually not on the same drivetrain. A 12-speed chain is narrower, and the tooth profile and ramp design of a ring are cut for a specific chain width and shifting system. Mixing them tends to produce poor shifting under load and accelerated wear. Match the ring to your drivetrain speed, which is listed on each product page alongside the BCD and mounting standard.

What is the difference between 3 mm and 6 mm offset on direct-mount MTB rings?

The offset sets the chainline, meaning how far the ring sits from the frame centreline. Many direct-mount MTB rings come in more than one offset, and the correct one depends on your frame's rear hub spacing, typically Boost or non-Boost. The wrong offset will shift poorly at the extremes of the cassette and wear the chain faster. Check your frame standard before ordering.

Do I need new bolts when changing a chainring?

Often yes, particularly when moving between a double and a single ring, because the required bolt length changes. Reusing worn or wrong-length bolts is a common cause of creaking and of rings working loose. Steel bolt kits are the durable, inexpensive choice, and alloy bolts should always be fitted to the manufacturer's torque figure with a torque wrench.