Set In Stone

Overview

Wheel Offset & Fitment Calculator

Compare wheel offsets and tire sizes on iPhone and iPad, with a live diagram, clearance changes, saved setups, and estimated speedometer differences.

What it does

  • Compare current and proposed wheel width, ET offset, tire width, aspect ratio, and rim diameter.
  • See a live wheel and tire diagram with relative clearance and outward-position changes.
  • Compare tire geometry and estimated indicated-versus-actual speed in metric or imperial units.
  • Keep saved setups and comparison history locally on your device.
  • One-time lifetime purchase. No recurring subscription or app account.