Tire Calculator PRO
Compare Sizes, Speedometer & Offset 482 Live
Original Tire
New Tire
DIAMETER DIFFERENCE
0%
SPEEDOMETER ERROR (100km/h)
100 km/h
RIDE HEIGHT CHANGE
0 mm
WIDTH CHANGE
0 mm
Long Term Impact (Yearly)
If you drive 20,000 km, your odometer will show 20,000 km.
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About This Tire Calculator
Welcome to the advanced Tire Calculator on calculators.cat. This tool helps you compare tire sizes when upgrading your vehicle's wheels. Understanding the diameter difference is crucial to ensure your speedometer remains accurate and your tires don't rub against the fenders.
Our tool calculates the speedometer error caused by changing tire sizes. For example, if you switch from a 16-inch to a 17-inch rim, the overall circumference may change, affecting your actual speed versus the reading on your dashboard.
Use the Overlay Mode to visually inspect the height difference and the Motion Test to see how rotation speed varies. This is essential for maintaining safety, ABS function, and transmission health.