Methodology

Every page on this site relies on three data layers. This page explains where each comes from, how we verify it, and how often it refreshes.

Layer 1 — Fitment data

Tire and wheel fitment (size, rim diameter, offset, PCD, load index, speed rating) is derived from manufacturer placards, OEM owner's manuals, and public NHTSA SaferCar VPIC records. We cross-check OEM fitments against the actual door-jamb placard data listed by manufacturers and against published owner manuals. Fitment data refreshes monthly.

Layer 2 — Tire specs (UTQG, warranty, dimensions)

UTQG treadwear, traction, and temperature ratings come from the NHTSA UTQG database, which is the legally authoritative US source. Warranty mileage comes directly from manufacturer-published documentation. dB noise figures, rolling-resistance class, and wet-grip class come from the EU tire-label database per Regulation 2020/740. We do not publish UTQG numbers from blog posts or third-party listings.

Layer 3 — Merchant prices

Prices come from the official affiliate-program data feeds we are enrolled in (via Awin, ShareASale, Commission Junction, and direct partner APIs). Each feed pulls nightly. We display the captured timestamp on every price block — if you see a price quoted, it was that price at the merchant within the last 24 hours. We do not surcharge or mark up the prices we display; clicking through takes you to the merchant's posted price.

What we don't do

• We do not publish a "best of" ranking ordered by affiliate commission rate.
• We do not generate AI-only review prose without a human source check.
• We do not list tires we cannot verify against a manufacturer-published spec.
• We do not give tire-safety prescriptive advice — fitment substitution decisions should be confirmed with the manufacturer or a qualified tire shop.

Corrections

If you spot a fitment or spec error, email [email protected] with the page URL and a primary source. We update the page and credit the correction.