How to find the right Trailer Tire & Wheel Assemblies AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Trailer Tire & Wheel Assemblies
- ST tire type
- Use tires marked ST (Special Trailer), not P (passenger) tires ST tires have stiffer sidewalls built for trailer loads and sway.
- Load range and capacity
- Combined tire capacity should exceed the trailer's GVWR with margin; check load range (B, C, D, E) Overloaded trailer tires overheat and blow out.
- Bolt pattern
- Match the axle hub: common patterns are 4 on 4, 5 on 4.5, 5 on 4.75, 6 on 5.5 and 8 on 6.5 inch Trailer patterns vary with axle capacity, and the wrong pattern will not mount.
- Speed rating
- Treat ST tires as limited to 65 mph unless the sidewall shows a higher speed symbol Running ST tires faster than rated sharply reduces their load capacity and life.
- Wheel finish for boat trailers
- Use galvanized or corrosion-resistant wheels for trailers dunked in water, especially salt water Painted steel wheels rust quickly after repeated immersion.
- Tire age
- Check the DOT date code; many makers advise replacing trailer tires after roughly 3 to 5 years regardless of tread Trailer tires usually fail from age and UV exposure before the tread wears out.
Brands that matter
- Carlisle: Radial Trail line is a widely used ST trailer tire.
- Goodyear: Endurance ST radial is a US-made trailer tire.
- Kenda: Loadstar trailer tires are common on utility and boat trailers.
- Maxxis: Offers ST radial trailer tires in higher load ranges.
- Dexstar: Dexter's trailer wheels, designed for its axles.
- Sendel: Trailer wheel maker frequently used in pre-mounted assemblies.
What to avoid
- Passenger or P-metric tires on a trailer
- Spares with a lower load range than the road tires
- Painted steel wheels on saltwater boat trailers
- Assemblies with old date codes sold as new
Questions
Radial or bias ply for a trailer?
Radials run cooler and suit highway miles; bias ply is cheaper and stiffer for short, low-speed or rough use. Do not mix the two on one axle.
Does a higher load range mean a better tire?
Only if you need the capacity. It also needs higher inflation pressure and a wheel rated for that pressure and load.