Cranksets

Road Crankset Buying Guide

The crankset is where your power meets the drivetrain. Chainring size, crank length, and bottom bracket compatibility all matter — get the wrong one and it won't fit your frame.

Chainring Configurations

Standard 53/39 for racers who can push big gears. Compact 50/34 for the rest of us — the most popular road setup. Semi-compact 52/36 splits the difference. 1x setups (40-46T with wide-range cassette) are growing, especially on gravel-road crossover builds.

Crank Length

170mm, 172.5mm, and 175mm are the common sizes. Shorter cranks (165-170mm) suit riders under 5'8" or those wanting higher cadence with less hip impingement. Don't assume your current length is correct — a bike fit can reveal a lot.

Bottom Bracket Standards

Shimano Hollowtech II uses 24mm spindles with external cups. SRAM DUB uses a 28.99mm spindle — works with BSA, PF30, BB386, and T47 via adapters. Campagnolo Ultra-Torque uses a 25mm hirth-joint spindle. Check your frame's BB shell before buying.

Power Meter Integration

Many modern cranksets accept spider-based or spindle-based power meters. Shimano's own power meter fits Dura-Ace and Ultegra. SRAM AXS cranksets take Quarq DZero spiders. Standalone options like Stages and 4iiii bond to the crank arm directly.

Buying Used

Check chainring teeth for shark-finning — worn teeth skip under load. Spin the spindle to check for bearing play. Scratches on crank arms are cosmetic. Look at the spider interface for any cracks, especially on carbon cranks.