Glossary

Dual matching

Last reviewed: 2026-05-20

The practice of ensuring that two tires mounted in a dual assembly are closely matched in overall diameter, tread depth, and inflation pressure to prevent one tire from dragging or carrying excess load. Industry guidance typically calls for dual mates to be within 4/32 inch of tread depth and within 5 PSI of pressure.

Dual matching is a check at every tire change and at every inspection of an axle. A new tire mounted beside a tire with 5/32 inch remaining may fall outside acceptable matching limits.

Real-World Use

A fleet technician preparing to replace one tire in a drive dual set measures the remaining mate at 4/32 inch — within the depth matching range for the 2/32 inch replacement minimum, but the fleet policy requires replacing both to keep matching within the 4/32 inch guideline.

What to Pair It With

Read this term with the full tire sidewall, vehicle rating information, manufacturer documentation, and the actual condition of the tire.

This site is for general information only. It does not replace professional tire service, DOT compliance advice, tire manufacturer instructions, vehicle manufacturer recommendations, or fleet policy.