Tyre stretch calculator
Get a rough idea of how stretched a fitment looks — then see what it actually looks like in real photos. It's simple geometry, not a spec: every tyre, brand and rubber behaves differently.
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Free to use — paste this where you want the calculator. It links back to the real photos here.
This is a rough geometric guide, not fitment advice. It just compares your rim's bead width to the tyre's nominal section width — it can't know how a specific tyre's brand, construction or rubber will actually sit, and it makes no claim that any combination is suitable, legal or safe for your vehicle. That's exactly why we show real photos: don't trust the number, look at the examples.