Tyre Size Calculator
Compare sizes and check speedometer error
Current Setup (Stock)
Diameter: 631.9 mm
New Setup
Diameter: 634.3 mm
Diameter Diff
+0.38%
2.4 mm
Speedo at 100km/h100.4 km/hActual Speed
Stock
New
Side Profile Comparison (Aligned Center)
Compare Tyre & Wheel Sizes Instantly
Changing your wheel setup? Our Tyre Size Calculator and visualizer helps you verify fitment before you buy. Compare tire diameter, sidewall height, and rim size differences between your stock and new setup.
Speedometer Error is a critical safety factor. A larger diameter tire will make your speedometer read lower than your actual speed. Use this tool to calculate the exact percentage difference and stay safe on the road. We support both Metric (km/h) and Imperial (mph) units.