How to check tire fitment

Practical tire fitment checks: overall diameter, rim width compatibility, offset basics, clearance at steering lock, and why online calculators are only step one.

Fitment is more than diameter math

Online tools excel at labeled geometry. Fitment also includes wheel offset, suspension travel, brake hardware, and even winter chain clearance if you use chains.

A simple at-home sanity pass

Inspect closest gaps at full steering lock with the vehicle loaded normally. Look for prior rub marks on inner fenders. If you are close on paper, assume you are closer in reality.

Ratings matter

Match or exceed placard load and speed requirements for your intended speeds and loads (including towing).

Frequently asked questions

Can I trust forums for fitment?
For ideas only—verify on your chassis with measurements and a professional.

Try the free tire size calculator

Open the interactive tire size calculator to compare diameters, see a wheel size comparison side by side, and review a speedometer difference table before you buy tires or wheels. It works like a quick tire fitment checker for geometry—not a substitute for a professional install bay.

← Learn hub · FAQ library · Example comparison

Important: Tire comparison results are estimates for planning only. This site does not provide mechanical certification, OEM approval, or on-vehicle clearance guarantees. Confirm final tire fitment, load/speed ratings, and speedometer calibration with a qualified tire professional or your vehicle and tire manufacturer before driving.

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