The physics engine for cyclists. Measure your aerodynamic drag (CdA) with a guided aero test on your phone, then predict your finish time on any Strava segment — and get an alert when conditions are right for a PR.
Riding with your phone? Get the RideProfiler app — Android (early access) · iPhone (coming soon)
A continuous loop of real-world aerodynamic measurement and predictive ride modelling.
Get your CdA from a guided aero test on your phone — an Out&Back on a short road section, or a set of laps — and from the laps in your own rides. Measured on the road, in your position, on your bike.
Combine your fitness curve with your measured aero profile to find the power for every section of a segment — then follow it live with the RideProfiler phone app, with a cue for every change.
RideProfiler scans the 48-hour weather forecast and sends a Priority Alert when conditions align for a KOM/QOM or PR attempt on your monitored segments.
Your CdA comes from riding built for measuring it — a repeated course, where the solver can tell drag apart from wind.
Ride a short, straight stretch of road — about 300 m — out and back at 20 and 36 km/h (45 on a TT bike) while the app guides your pace. Riding both directions cancels the hill and a steady wind along the road, and the two speeds separate drag from rolling resistance.
Ride laps of a velodrome at 36 km/h (45 on a TT bike) with the app calling your pace; on a calm day add a block at 20 km/h and it measures your rolling resistance too. Every lap faces the wind from every direction, which is what separates wind from drag.
Sync or upload a ride with three or more laps of a closed circuit and RideProfiler finds and analyses them automatically — no test needed.
Free covers aero testing and laps analysis; Pro adds the ride modeller, pacing and segment alerts for $49 a year.
RideProfiler