About RimRatio
RimRatio is a small, independent website with free tire size calculators, comparisons and reference charts. It exists because questions like "how much taller is 285/70R17 than 265/70R17?" often lead to long forum threads; we wanted fast, transparent answers that work on a phone.
What we do
- Turn tire size codes into real dimensions, speedometer and RPM effects — instantly, on any device, without sign-up.
- Show our formulas (methodology) so you can check every number.
- Keep pages short, fast and focused on the decision you are making.
What we don't do
- We are not a tire retailer or manufacturer and we do not sell tires.
- We do not give vehicle-specific fitment, pressure or load advice. That belongs to your vehicle maker, your placard and a qualified installer.
- We do not publish reviews, ratings or testimonials.
Who runs it
RimRatio is run by a small independent publisher. Pages are written and maintained with the help of software, including AI writing and coding tools; every number on the site is produced by code that is covered by automated tests rather than typed by hand. Read more in our editorial policy.
How the site is funded
The site may show advertising. Advertisers have no influence over calculations or content, and ads are placed outside calculator results wherever we control placement. See the privacy policy for details.