A calculator to get you started, and a log that remembers what actually worked — on your bike, in your conditions. The best pressure isn't a formula. It's the one you find yourself.
The four best-known tyre pressure calculators disagree with each other by up to 1.7 bar on the same setup. No calculator can be the ground truth — your own log can.
Every setting you try, every ride you rate. Your pressure history, always on hand.
A starting point based on published tyre-drop research — never a black box, always explained.
Bike, wheels and tyres as picklists, not homework. Switch set-ups with one tap.
Hard caps for tyre, rim and hookless rims — you'll always see why a number was capped.
No account, no ads, no analytics. Your data stays on your phone and in your own iCloud.
Bar or psi, kg or lb — switch anytime. Built in English and Dutch from day one.
Built openly, one evening at a time — designed for people who'd rather ride than do math. Check back here for updates on the launch.