Prepare a clearer tire inquiry
Before / after

Cooper Tire fitment guide

Move from an incomplete size request to a useful application brief with a few practical checks.

Reading a tire sidewall

Build your fitment checklist

Enter the information at hand. This guide is a reminder, not an automatic compatibility determination. Verify the final specification against the vehicle and product documentation.

Three examples of a complete brief

Passenger car

Provide make, model, year, size, load index, speed rating and seasonal driving conditions. Include the destination market and required quantity.

Pickup

Add axle loads, payload and the proportion of paved and unpaved use. Confirm clearance and approved size with the vehicle manufacturer.

Commercial vehicle

Identify steer, drive or trailer position, operating route, load and replacement schedule. Request the relevant product documentation.

A useful inquiry also explains how the vehicle is used. Record typical axle loads, operating speed, climate and the mix of paved and unpaved roads. For a fleet, specify whether the position is steer, drive or trailer, together with expected quantities and replacement timing. These details help distinguish a general catalog search from a request that can be assessed in context. Ask for the appropriate product specification and market documentation, and keep unresolved assumptions visible until they have been checked. For example, 225/45R18 describes a 225 mm nominal width, 45 aspect ratio, radial construction and an 18 inch rim diameter; it is an illustration, not a recommendation. A sidewall size describes width, aspect ratio, construction and rim diameter. It does not alone establish a tire's load capacity or speed suitability. Record the complete marking and check it against the vehicle placard. If you are replacing a tire with a different specification, obtain qualified confirmation before installation.

Turn your notes into an RFQ

Include vehicle or platform, year, VIN or OE reference where relevant, size, load, duty, destination and quantity. Mention any validation or documentation needed for your purchase.