Free, no sign-up
Garage tools
Calculators that answer the questions riders actually stop and look up mid-job. They run in your browser, work on a phone in the pits, and cost nothing.
- Gearing calculator Compare two sprocket setups: exact ratio, what happens to pull and top speed, and the chain length difference. Open
- Premix calculator Any ratio, any amount of fuel, oil measured in both millilitres and fluid ounces. Open
- Sag calculator Race sag and free sag, lined up with the figures your manual prints. Open
- Tire size decoder Decode the sidewall, compare two sizes, and see what a taller or shorter tire does to your gearing. Open
- Chain length calculator Changing sprockets? The exact number of links you need, from the chain you run now. Open
- Service schedule Your hours or races against the owner's-manual schedule: what is due, with the page for each item. Open
- Setup sheet The clicker settings, sag, springs, engine maps, jetting and flash codes your bike’s own manual prints, with a log for your own setup. Open
- Seat height finder A rider’s inseam against every bike’s stock seat height, with the source of each figure. Open
- My Bike Save your bike and log each service: every item on the manual’s schedule is due on its own interval, with the stock specs beside it. Open
- Maintenance log A free one-page log to print: date, hours, work done, parts and fluids. Every bike page has a printable spec card too. Open