Disclaimer

Not fitment or installation advice

The calculator results are based on the mathematical equations of the tire sizes entered, not a guarantee of fitment. Diameter difference under the common 3% guideline is not a fitment guarantee. Modifying tire size can affect suspension, brake caliper and body clearance, speedometer accuracy, and ABS/ESC calibration. Always check your vehicle's owner manual, the tire placard on the driver's door jamb, and consult a qualified installer before purchase.

The ±3% diameter-difference figure used elsewhere on this site is a common industry guideline, not a legal standard, not a guarantee, and not advice specific to your vehicle. A size that falls within it can still be wrong for a given vehicle, and a size outside it is not automatically unsafe -- always check your vehicle manufacturer's specifications and consult a qualified installer.

Informational site, not professional advice

Everything on this site -- the calculator and the reference guides -- is provided for general informational purposes only. It is not automotive, mechanical, safety, or legal advice, and it does not replace your vehicle owner's manual, the tire placard on the driver's door jamb, or a qualified tire installer or mechanic.

No warranty

This site and its calculator are provided "as is", without warranty of any kind, express or implied, including but not limited to accuracy, fitness for a particular purpose, and non-infringement, to the fullest extent permitted by applicable law.

Limitation of liability

To the fullest extent permitted by applicable law, the site operator is not liable for any loss or damage -- direct, indirect, incidental, or consequential -- arising from your use of, or reliance on, this site or its calculator results, including any vehicle handling, speedometer/odometer, ABS/ESC, or clearance issue that follows a tire size change.

Third-party links

Links to other sites (manufacturers, retailers, reference sources) are provided for convenience. This site does not control and is not responsible for the content, accuracy, or practices of any third-party site it links to.

Intellectual property

The tire-geometry formulas used by the calculator are public engineering formulas, not proprietary to this site, and are cited with their source in the calculator's methodology section. The site's own text, layout, and code are the property of the site operator (Manduc S-V Emanuel Sorin PFA) unless stated otherwise.

Governing law

This site is operated from Romania, and use of this site is governed by the law of Romania (see Contact for the operator's registered identity).