Is your gearing low enough for your climbs?
Enter rider, route and drivetrain to see whether your easiest gear is enough and which setup fits better.
Your gears
How to read the chart
Each dot is a gear, placed by its speed at rpm. The green line is your speed on the steepest section, which only depends on power, weight and gradient. With every gear left of the line you climb at least at this cadence, to the right of it you have to pedal slower.
Setups that work
How mybikesetup calculates
Climbing power goes into three resistances: gravity, rolling resistance and air drag. The calculator solves for the speed at which your power is exactly enough:
P · η = m · g · (sin θ + Crr · cos θ) · v + ½ · ρ · CdA · v³
Power is assumed constant over the whole climb. Speed on the steepest section determines cadence, speed at the average gradient determines duration. Speed, wheel circumference and cadence give the gear ratio. Assumptions: rolling resistance 0.004 on road, 0.008 on gravel and 0.012 on MTB, CdA 0.40, 0.42 and 0.50 m², drivetrain efficiency 97 %, air density 1.2 kg/m³. Easy equals 60 % and steady 75 % of FTP, and the share can be set freely. All out uses the power you can roughly sustain for the duration of the climb, estimated as FTP × (duration / 60 min) to the power of −0.07. This is a rough guide and varies a lot between riders. Without FTP the calculator assumes 2.0, 2.8 or 3.5 watts per kilogram.
Derailleur capacity = (largest minus smallest chainring) + (largest minus smallest cog). It is checked against capacity, largest cog and maximum chainring difference as specified by the manufacturer. Freehub, chain and shifter compatibility are not checked.
Sources: Shimano specifications, SRAM RED XG-1290, SRAM FC-RED-E1, SRAM XG-1371, Campagnolo Super Record 13, Super Record X, Ekar. Older 10 and 11-speed SRAM cassettes come from the SRAM model pages. Individual cogs of current SRAM AXS cassettes and Campagnolo 11 and 12-speed come from dealer data sheets and are marked as such. As of October 2026.
Results are a guide. Check with the manufacturer or your bike shop before buying.