Castle Rock ST225/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel - 6 on 5-1/2 - Load Range D

Castle Rock Trailer Tires and Wheels - LHACK124

Radial tire has an 8-ply rating and a 2,540-lb max load at 65 psi. 15" x 6" Steel wheel has a 6 on 5-1/2 bolt pattern. Nitrogen fill maintains tire pressure. 1-Year No Excuses Guarantee on tire. Complimentary roadside assistance included.

Features:

• Tire-and-wheel assembly is ideal for RVs, campers, and trailers
• Nitrogen fill maintains tire pressure longer than standard air
  • Helps prolong the life of the tire and wheel
• Sturdy steel wheel with modular design
  • Silver powder coat finish over e-coat primer resists rust
• Beveled stud holes help to keep wheel securely in place on trailer hub
  • Eliminate the need for constant retightening of lug nuts
• Castle Rock radial tire is constructed with double steel belts and double nylon plies
  • Nylon tread-firming belt overlays help prevent tread separation
  • Tread wear indicator (TWI) makes it easy to see tread depth
  • Radial ply tire is great for highway use
• Siping on the tire tread channels water away from the tire to improve traction during wet, snowy, or icy conditions
• Special trailer (ST) tire has sturdy sidewalls so that it can handle heavy loads
  • Created specifically for trailers and not intended for use on other vehicles
• Complimentary roadside assistance for 2 years
  • Flat tire service available 24/7 anywhere in the United States, Canada, or Puerto Rico
• Assembly meets DOT specifications
  • Tire meets FMVSS specifications
  • Wheel meets SAE J1204 standards
• Center cap sold separately

Specs:

• Rim dimensions: 15" diameter x 6" wide
• Bolt pattern: 6 on 5-1/2"
• Wheel bolt size: 1/2"-20
• Wheel capacity: 2,850 lbs
• Pilot diameter: 4.29"
• Offset: 0
• Tire size: ST225/75R15
  • Section width: 8.78"
  • Outer diameter: 28.3"
• Tire capacity:
  • Load range: D
  • Ply rating: 8
  • Maximum load: 2,540 lbs at 65 psi
• Tread depth: 9.5/32"
• Maximum speed: 75 mph (speed rating L)
• Warranty:
  • 5-Year on tire
  • 1-Year on wheel
• 1-Year No Excuses Guarantee on tire

Lionshead Roadside Assistance Program

This tire-and-wheel assembly comes with complimentary roadside assistance for 2 years. If your RV or trailer has a flat tire, call the help line and a technician will come change the flat for you. You can call 24 hours a day, 7 days a week, and 365 days a year from anywhere in the United States, Canada, or Puerto Rico.

1-Year No Excuses Guarantee

This tire has a 1-year No Excuses Guarantee. If within the first 12 months the tire is damaged in any way that's not covered by warranty, it will be replaced at no charge. You will also be compensated a flat labor rate for the cost of mounting the replacement tire.

The Nitrogen Advantage

The NitroFill inflation process filters out oxygen to ensure that this tire-and-wheel assembly is filled with 95 to 99.9 percent pure nitrogen. Nitrogen-inflated tires maintain pressure better than tires inflated with standard air. This makes them ideal for RVs and trailers that are driven infrequently or sit in storage for long periods of time. Other benefits of consistent tire pressure are better fuel economy, improved braking and handling, decreased chance of tire failure, and longer tire life.

A tire inflated with standard air, which contains oxygen, is prone to fluctuations in pressure due to loss of air over time and ambient temperature changes. Nitrogen-inflated tires don't experience these fluctuations for a couple reasons. First, nitrogen molecules are larger than oxygen molecules, so they are less likely to permeate a rubber tire. Second, nitrogen is a dry gas, so it won't allow condensation to build inside the tire. A tire inflated with standard air may have moisture in it, which means it is more likely to be affected by ambient temperature.

In addition, the moisture that can collect in a tire inflated with standard air will contribute to corrosion of the wheel and deterioration of the rubber tire from the inside out. A nitrogen-inflated tire-and-wheel assembly is less likely to experience this type of decay. Less moisture in the tire also means reduced running temperatures.

If necessary, you can top off the tire with standard compressed air. But to maintain the benefits of nitrogen, the tire must be refilled with nitrogen.

Beveled Stud Holes

The stud holes on this steel wheel are beveled to ensure that the wheel stays tight against your trailer hub. This also eliminates the need to constantly retorque the lug nuts.

Castle Rock Radials

Unlike standard trailer tire tread, which has solid, continuous ribs, the tread on these Castle Rock radials has ribs with breaks. These breaks allow water to run off to the sides. The Castle Rock tread also has sipes. Siping is a process in which thin grooves (or sipes) are cut into the rubber of the tire. The grooves channel water away from the tread so that the tire makes better contact with the road. Both of these features greatly improve traction during wet, snowy, or icy conditions.

Castle Rock radials are constructed with double steel belts and double nylon cords. A protective layer of nylon is wrapped around the steel belts to help prevent tread separation.

Radial Tires vs. Bias Tires

Radial ply tires are designed for trailers that are towed on the highway. The cords on a radial tire are positioned at a 90-degree angle to the direction of travel so that they lay across the width of the tire from wheel lip to wheel lip. This construction prevents the cords from rubbing against one another when the tire flexes, unlike the cords on a bias ply tire. As a result, radial tires have less rolling resistance and heat buildup, which leads to a longer tread life and improved steering at higher speeds.

Determining the Bolt Pattern

The first number in the bolt pattern is the number of bolt holes. The second number denotes the diameter, in inches, of the circle on which the bolt holes sit.

To determine the bolt-circle diameter on wheels with an odd number of bolt holes, measure from the center of any bolt hole to the point halfway between the two bolt holes directly across from the first. (Example: "5 on 4-1/2" means 5 bolt holes with 4-1/2" measured to a point halfway between the opposite bolt holes.)

On wheels with an even number of bolt holes, measure from the center of one bolt hole to the center of the hole directly across from it. (Example: "8 on 6-1/2" means 8 bolt holes with 6-1/2" from the center of one hole to the center of another on the opposite side.)

Measuring the distance from the center of one bolt hole on the wheel to the center of a bolt hole right next to it can also help to determine the bolt pattern.

• If D = 2-5/8", then the bolt pattern is 5 on 4-1/2"
• If D = 2-3/4", then the bolt pattern is 5 on 4-3/4"
• If D = 3", then the bolt pattern is 5 on 5"
• If D = 3-1/4", then the bolt pattern is 5 on 5-1/2"

ACK124 Lionshead Castle Rock ST225/75R15 Radial ST Tire with 15" Silver Modular Rim - 6 on 5.5 - LR D

Alternate part number: A-HZCR-225RD-JGMR-150-600-6SIL

Replaces A-HZCR-225RD-NBMR-150-600-6S28 and A-HZCR-225RD-JGMO-150-600-6SIL