You're viewing new Hi Run JK42 Trailer Tire | ST225/90R16 | E | Manufacturer Part No WD1236.
Hi-Run JK42 Trailer Tire
Count on the Hi-Run JK42 trailer tire when you want steady, no drama towing. Built for trailers, it prioritizes stability under load, predictable tracking at its rated highway speeds, and resistance to heat and wear on long hauls. A robust casing and practical tread pattern promote even contact and confident braking, and the range of sizes and load ranges makes it easy to match your trailer. Choose the JK42 for value-driven performance that helps protect your cargo and your schedule.
Features and Benefits
The Hi-Run JK42 favors dependable towing over flash. Its durable casing manages heavy tongue weights and sustained highway use, while stable shoulders help it track straight and change lanes with confidence. The tread is tuned for even wear and water evacuation, improving wet-road control, and the compound resists heat to support tread life in summer. Whether you tow a utility, boat, or cargo trailer, the JK42 delivers practical durability and value.
Sizes, Load Range, and Fitment
Choosing the correct JK42 comes down to size, load range, and speed rating. Start with your trailer placard or data plate to confirm the OE ST size, then select a matching JK42. Pick a load range that meets or exceeds the axle GAWR with a safety margin, so total tire capacity covers your heaviest loaded weight. Finally, verify the speed rating on the sidewall and follow the lower of the tire or trailer limit, and consult your manual or a qualified installer if you are unsure.
How to read a trailer tire size
Most trailer tires use ST sizing such as ST205/75R15 or ST175/80D13. The first number is section width in millimeters, the second is aspect ratio, and R or D indicates radial or bias construction. The final number is wheel diameter in inches. Also confirm load range, such as C, D, or E, for max load and pressure, and the speed symbol, then match size to your wheels and keep capacity at or above your needs without exceeding the listed pressure or speed.
Performance and Towing Confidence
On the road, the Hi-Run JK42 is tuned for stability first. The tread helps it track straight and make predictable lane changes, and the sturdy casing resists deformation under tongue weight and sway forces. A heat resistant compound manages temperatures during summer towing and stop-and-go traffic, while grooves channel water to aid grip on maintained pavement. For best results, set cold inflation to the trailer specification and keep loads balanced front to back and side to side.
Price and Value
The Hi-Run JK42 offers a cost effective path to dependable towing. Price varies by size, load range, and whether you choose tire only or a tire mounted on a wheel. Many buyers pick the JK42 for straightforward durability, ready availability, and a low cost of ownership. Watch for seasonal promos, multi-axle bundle savings, and fast shipping, and filter by your required size and load range to see live pricing.
JK42 vs. Other Trailer Tire Types
Choosing between radial and bias construction depends on how and where you tow. Radials typically run cooler and track well on highways, which can extend tread life for long trips. Bias designs often have a more rigid sidewall that suits slower speeds, unpaved access, or heavy utility work. Confirm the JK42 construction in your size, then match it, along with load range and speed rating, to your real use.
Maintenance and Safety
Proper care maximizes JK42 service life. Inflate to the trailer maker's recommended cold pressure and recheck before every trip, and never exceed the tire speed rating, since heat is a trailer tire's biggest enemy. Keep loads within combined tire capacity with a 10-15% margin and distribute weight evenly to limit sway. Inspect tread and sidewalls for cuts, bulges, or irregular wear, replace aged or damaged tires, rotate on tandem axles if needed, and torque lugs to spec, then re-torque after wheel service.
Break-in and rotation tips for tandem-axle trailers
After mounting new JK42 tires, drive moderately for the first 50 to 100 miles to let the tread scuff in. On tandem axles, tight turns create scrub that can accelerate shoulder wear, so periodic rotation can help. A common pattern is front axle to rear axle, same side, when wear suggests it, but confirm with your service provider. Check alignment, bearing preload, and suspension bushings, and re-torque lugs after 50 to 100 miles and again after heavy loads.
