How to use the tool, how the models work, and why it matters.
Set up your rider profile, add a bike, import a ride and see your first numbers.
What makes a ride 'qualifying' and how imports refine your CdA.
How frame size, tires, rim widths and cockpit choices feed the model.
Upload a side-on photo or short clip and get fit observations tied to CdA.
Reference figure first, then size, fit and position, then your rides.
Where tire Crr comes from and how setup changes it.
Why mannequin, speed and yaw matter, and how figures are put on one baseline.
How height, inseam and cockpit become saddle-to-bar drop and reach.
Most CdA tools need a velodrome or a perfect test loop. WattGap learns from the rides you already do.
Compare aero road bikes on one baseline, with test speed, yaw and source shown.
Turn bike, wheel, tire and position choices into seconds over your real routes.
Lab-tested Crr adjusted for your rim width, pressure, tubes and roads.