Steer, drive and trailer tires: the difference
Even in the same size, steer, drive and trailer tires are built differently. Can they replace each other?
Steer axle tires
Rib tread with longitudinal grooves for straight running, precise steering and even wear. The steer axle is the most critical position: a blow-out can mean loss of control. Fit your newest, best tires on the steer axle.
Drive axle tires
Deep, block-type tread that puts engine torque on the road and gives grip when pulling away and in the wet. A drive tire on the steer axle causes vibration and noise; a steer tire on the drive axle loses traction.
Trailer tires
Trailer tires carry load but do not drive. Their sidewalls resist scrubbing in turns and their load index is high. Wide singles such as 385/65R22.5 are common on trailers. Trailer tires do not belong on a drive axle.
Mixing and duals
- Do not mix patterns, sizes or radial and bias tires on the same axle.
- Dual tires should not differ by more than about 6 mm in diameter, or the larger tire carries most of the load. Use the dual tire match tool.
- Set pressures cold, following the tire maker's load/pressure table.
"All position" tires can be used on steer and trailer axles; still check the manual.