AWD & xDrive Checker
Check if mismatched front/rear tyre sizes are within safe tolerance for your AWD, xDrive, Quattro, or 4MATIC system.
🟢 Free Tool
Why this matters: AWD systems rely on all four tyres rotating at similar speeds. Mismatched diameters cause the centre differential or transfer case to constantly compensate — leading to premature wear or catastrophic failure. Most manufacturers specify a maximum 1% circumference difference.
Enter Your Sizes
⬤ Front Tyres
⬤ Rear Tyres
Visual Comparison
FRONT
245/35R19
REAR
265/35R19
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Circumference difference between front and rear
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