Triathlon Tools

Bike Split Predictor

The simulator applies your target power to the course elevation profile and models aerodynamic drag, rolling resistance, gravity, drivetrain loss, and air density at each step.

Simulation Inputs
Start with the defaults, then tune the values to match your race setup.

Course & conditions

Choose a profile and set the race-day weather.

View source route

Processed locally—your file isn’t uploaded.

°C
%

Rider & bike

Your planned output and system mass.

W
kg
kg
km/h

Equipment

Tune the losses from tires, position, and drivetrain.

CdA m²
%
Crr
%

Results

Run the simulator to see your predicted split.

Your prediction will appear here

Choose a course, adjust your setup, and run the simulation.