Save your car's specs once and every calculator on TunerBench can pre-fill them with one click. Everything stays in your browser - no account, nothing uploaded.
Your specs are stored in your browser's local storage on this device - they never leave your machine, and there's no account or login. On any calculator where your saved specs are useful (tire size, gear ratio, 0-60, wheel offset), a "Fill from My Garage" button appears next to the share buttons. One tap and the calculator is set up for your car.
Don't know your exact specs? Decode your car in the VIN Decoder first - it returns factory weight class, power, and drivetrain, and the tire calculator presets carry factory tire sizes for common platforms.
Saving overwrites the previous profile, so switching cars is just re-saving. "Clear saved car" removes the profile entirely. Because storage is per-browser and per-device, your phone and laptop each keep their own garage.