Get in touch with the Tire Size Calculator team. We're here to help with your tire size calculations and provide support for our free tools.
For technical support, bug reports, or general inquiries
For partnerships, advertising, or business opportunities
Simply enter your current tire size and the new tire size you're considering. Our calculator will show you the differences in diameter, speedometer error, and safety recommendations.
Yes! All our tire calculators and tools are completely free to use. No registration or payment required.
Our calculations use industry-standard formulas and are based on manufacturer specifications. However, always consult a tire professional for safety-critical decisions.
Absolutely! We're always looking to improve our tools. Use the contact form above with "Feature Request" as the subject.
We're a calculator tool only. We don't sell tires, but our calculations can help you make informed decisions when shopping with tire retailers.
We regularly update our tire size database with new sizes and specifications as they become available from manufacturers.