Terms of Service

Effective date: June 2026

Use of the service

TreadSize is provided free of charge for personal and professional informational use. You may use the calculators, guides, and reference pages for any lawful purpose.

No warranty

TreadSize provides tire size calculations based on standard ETRTO formulas. We make no warranty — express or implied — that the computed values are suitable for any specific vehicle, application, or jurisdiction. Tire fitment involves physical constraints (wheel well clearance, load rating, speed rating, offset, hub bore) that our tools do not assess.

Always confirm fitment with a qualified tire professional and your vehicle's owner's manual before purchasing or installing tires.

Limitation of liability

TreadSize and its operators shall not be liable for any damages arising from use of the information on this site, including but not limited to tire-fitment decisions, vehicle damage, or personal injury.

Affiliate links

When affiliate links are live (disclosed at the point of use), clicking them may result in us earning a commission if you make a purchase. This does not affect the calculations shown.

Contact

Questions: hello@treadsize.com