Feel the ratio before the ride.
Spin a virtual crank, shift between chainrings and cogs, then place two setups on the same virtual hill. ChainLab shows estimated cadence, speed and steady-state power side by side. Ride a looping virtual course and watch the auto shifter click through the cassette with drivetrain sounds, or take over and keep your cadence in the green.
Calculations are educational estimates based on your inputs, not a measurement of your bike or a guarantee of performance.
Download on the App Store