Work out time trial prediction instantly with clear inputs, formula shown and shareable results.
Time trials scale like endurance events but with a smaller fade, so a Riegel-style exponent of about 1.04 fits cycling better than the 1.06 used for running. The lower exponent reflects that a cyclist's aerodynamic position and steady effort make the drop-off with distance gentler than in running.
Prediction
t2 = t1 x (d2 / d1) ^ 1.04
Speed
speed = target distance / predicted time in hours
t2 = t1 x (d2 / d1) ^ 1.04. Time trials scale like endurance events but with a smaller fade, so a Riegel-style exponent of about 1.04 fits cycling better than the 1.06 used for running.
The lower exponent reflects that a cyclist's aerodynamic position and steady effort make the drop-off with distance gentler than in running.
Enter distance already time trialled, time for that distance, target time trial distance. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.