Pick a chainring, cassette sprocket, and wheel. See how cadence and speed relate at that gear. Edit either slider and the other follows.
Gearing tells you the cadence for a given speed, not what that speed costs. For the power side, the cycling drafting power calculator shows what holding a group's pace takes at each position in a paceline, and the bike split calculator estimates a finish time over a real GPX route.
Buy me a coffeeUpload a GPX or pick a famous climb (Alpe d'Huez, Ventoux, Stelvio, Kona). Course-specific finish time, IF, TSS, race plan.
Watts saved at every position in a paceline. Built on peer-reviewed peloton aerodynamics.
Estimate FTP from one max effort or fit critical power from several. Coggan 7-zone training zones, W/kg, power-duration curve.
Build a reusable weekly training schedule for cycling, running, climbing and strength. Plan several people, print on A4, export to .ics.