Data Sources

We're upfront about where our information comes from. Different parts of the site are built differently.

Tire-size calculations

The tire calculator and comparison pages are pure math — standard ETRTO/T&RA industry formulas. Nothing is stored or invented; every number is derived from the size you type and can be checked with a calculator.

Tire brand catalog

Brand and product information (season, segment, vehicle type, headline features) reflects how each manufacturer publicly markets the product line. We list popular fitment sizes for reference; exact availability is confirmed at the retailer.

Pricing

We don't store prices. “Check price” links open live results at the retailer, so the price you see is the current price they're charging.

Bolt patterns & fitment

Vehicle specs are populated from manufacturer references and public industry databases. Each record carries its source. See Our Crawler for how we collect this responsibly.

Found a mistake?

Email data@comparewheels.com with the page and the correction and we'll fix it.