Race Simulator

Know your finish time before the start line — a physics engine that rides the actual course profile with your power, weight, and equipment.

Simulate a race See the step-by-step guide

Benefits

Real physics, not a formula

Know your finish time before the start line — a physics engine that rides the actual course profile with your power, weight, and equipment.

Real physics, not a formula

Gravity, rolling resistance, aerodynamics, and descents with braking are simulated segment by segment along the route.

Your numbers, automatically

Signed in, the simulator uses your synced FTP and weight; anyone can also run it with manual inputs — no account required.

Pace with confidence

Time and speed per section show where the race is decided and what your climbing pace will look like.

Ride the Tour

A dedicated pro-events simulator lets you set your time on real Tour de France stages and compare yourself against the pros.

Ask the coach about it

In chat, the coach can run simulations for your goal events and discuss pacing.

How it works

Step by step

The same steps you'll find in the help guide.

Open Simulator (public) and pick a course — or a Tour de France stage in the pro-events simulator.

Enter your data (FTP, weight, position/equipment) — or sign in and let Ridium prefill your real values.

Run the simulation: the engine computes speed physics over the course profile.

Read the results: total time, average speed, and section-by-section breakdown (climbs vs. flats vs. descents).

Iterate: change target power or equipment and see the impact — great for pacing decisions and "what if" questions.

In action

Screenshots

Real screens from the product, captured with demo data.

A chat message where the coach runs a simulation for a goal event.

Frequently asked questions

Before you start

Do I need an account?

No — the simulator is public. An account prefills your real FTP/weight and lets the coach use it on your goal races.

How accurate is it?

It's a physics model validated against real rides; conditions (wind, drafting, surface) still matter, so treat results as a strong baseline, not a promise.

Which FTP does it use?

Your estimated FTP from synced data when signed in; you can always override it manually.

What courses are available?

Curated event routes from the directory and pro stages; more are added continuously.

Can it simulate my own GPX?

Course coverage comes from the event directory today; ask us for events you'd like added.

Race Simulator

Simulate a race and let Ridium work on your real Intervals.icu data.

Simulate a race Read the guide