Free fitment and stance calculators — for the people who measure before they buy.
Five Tools. Zero Guesswork.
The main event. Car + suspension + wheel spec = full fitment verdict. Clearances, spacer recs, camber requirements. Zero guesswork.
Convert JDM/Euro ET to American backspacing (and back) instantly. Includes lip depth and hub centreline breakdown.
Know your stretch rating before you order. Calculates stretch amount, sidewall angle, and safety classification — live cross-section diagram included.
Corner weight + motion ratio = correct spring rate. With damper guidance for street, track, and show setups.
Side-by-side scaled diagram of two tyre sizes. Diameter difference, sidewall height, speedo drift. Pick your tyre upgrade with confidence.
The forums have 47 pages of contradictory advice. The wheel shop wants to sell you what’s in stock. The Instagram build thread skips the specs.
The measurements don’t lie. Get the numbers right once, and every purchase decision after that is made with confidence instead of hope.
FTMNT is built by people who measured wrong, bought wrong, regretted it, and learned. The calculators are the shortcut we wish we’d had.