Terms of use

Information only

The calculators give estimates based on nominal tire and wheel sizes. They are not professional advice. Before changing tire size, pressure, wheels or gearing, check your vehicle maker’s recommendations, the tire maker’s specifications and a qualified tire professional.

Safety

Never inflate a tire beyond the maximum pressure on its sidewall, and never fit a tire with a lower load index or speed rating than your vehicle requires.

No warranty

The site is provided as is. We work to keep it accurate but do not guarantee that every figure is correct, complete or current, and we are not liable for any loss or damage arising from its use.

Other websites

Links to stores and other sites are provided for convenience. We do not control those sites and are not responsible for their content, prices, products or policies.

Trademarks

Tire and store brand names belong to their owners and are used only to identify their products. We are not affiliated with or endorsed by them.

Changes

We may update these terms; the date below shows the latest version.

Last updated 2026-10-28.