biketools.cc

Configure options

Pick chainrings and cassette for each option. Set rider weight, bike weight, and tire in the Setup section of the bar below.

Drivetrain simulator

Pedal it, shift it, feel it.

A working 3D drivetrain. The bar below sets your rider, bike, and ride scenario — drag speed or power; the other follows.

Cadence at best gearingauto-shifted · at 97 W · per gradient
hover or tap to inspect a gradient
Each line is the best cadence the drivetrain can give at the rider's watts. Dips below 70 rpm mean even the easiest gear runs out.comfort 80–100 rpmtight · 70–80-5%0%+5%+10%+15%+20%0407080100130gradientcadence (rpm)-0.4%Option 1

Auto-shifted to the gear closest to 90 rpm at the implied speed. Where the line drops below 80 (faint dot) the easiest gear is starting to run out; below 70 (filled dot), the drivetrain is genuinely limiting.

Max climb at comfort cadenceat 97 W · 80 rpm in the easiest gear
  • Option 1+3.2%false flat

Steepest gradient your power can hold while keeping the easiest gear at 80 rpm. Above this you'd grind below comfort cadence (or have to push harder than 97 W).

Top speed cap at comforthardest gear · 100 rpm — above this you're spinning out
  • Option 157.4 km/h50×11
Cassette cog laddereach cog plotted by cadence at 25 km/h on the big chainring · gaps = shift size
  • Option 1
    11
    32

← hardercadence at 25 km/h (rpm)easier →

Ride auditdrop a .FIT file from your bike computer and we'll tell you whether the drivetrain was a fit for the climbs

Drop a .FIT file here, or

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