Tire Size Matters is an online tire comparison resource that helps drivers find suitable tires and compare prices from retailers. Its site covers more than 101,000 tires across a wide range of brands, including Michelin, Goodyear, Bridgestone, Continental, and many others. Visitors can search by tire size, vehicle, category, or price, and browse options for cars as well as all-terrain, ATV/UTV, commercial, farm, lawn and garden, industrial, and trailer applications.

The website provides tools and guides to help shoppers understand tire specifications and make informed choices. These include a tire size calculator, size comparison features, a tire size chart, pressure calculator, speedometer calibration, speed-rating and load-index information, and instructions for reading a tire sidewall. Users can also look up original tire sizes by vehicle make, model, and trim, then compare prices from retailers. Tire Size Matters describes its comparisons as unbiased and aims to help users find suitable tires at competitive prices. The site participates in affiliate programs, including Amazon’s, and may earn commissions on purchases made through its links.