What to Check Before Your Next Trip

RV tire safety starts with checking cold inflation pressure, inspecting for damage, and keeping your loaded RV within its weight limits. Understanding the markings on your tires also helps you select appropriate replacements. Make these checks part of your departure routine, even when the tires look fine at a glance.

How do you read your RV tire’s sidewall markings?

Your tire’s sidewall identifies its size, construction, load capacity, and speed rating. For example, you might see ST235/80R16 123/119L:

ST: Special Trailer, identifying a tire designed for trailer use.
235: The tire’s nominal width in millimeters.
80: The aspect ratio. The sidewall height is approximately 80% of the tire’s width.
R: Radial construction.
16: The wheel diameter in inches.
123/119: Load indexes for single-tire and dual-tire applications, respectively. Dual means two tires mounted side by side, not two trailer axles.
L: The speed-rating designation. Use the tire manufacturer’s chart to confirm its meaning and operating limitations.

A speed rating is a tire capability designation, not a recommended towing speed. Follow posted limits and any lower limits specified for your tires, RV, or towing equipment.

When replacing tires, confirm the required size, load capacity, inflation pressure, and wheel compatibility. Use your RV’s certification and Tire and Loading Information labels, along with the tire guidance in your owner’s manual. On Keystone trailers, these labels are generally located on the exterior front left sidewall.

What pressure should your RV tires have?

Use the recommended cold inflation pressure shown on the RV’s Tire and Loading Information label for its specified tires. If the tires or wheels have changed, confirm the appropriate requirements with the manufacturer or a qualified tire professional.

Before each trip:

Check every tire while cold, before driving and heat buildup.
Use an accurate tire pressure gauge.
Adjust pressure to the applicable recommendation.
Check the spare and inspect valve stems and caps.

The maximum pressure molded onto a tire’s sidewall is not automatically the correct inflation target for every installation.

Underinflation can generate excessive heat and contribute to tire failure. Pressure normally rises during travel, so do not bleed air from a hot tire simply to reach the cold-pressure setting.

What tire damage should you look for?

Walk around your RV before departure and inspect accessible tread and sidewalls for:

Uneven or excessive tread wear
Cracks, cuts, or bulges
Embedded nails, screws, or other objects
Exposed cords or separating tread
Signs of rubbing against nearby components

Arrange a professional assessment if you find damage, repeated pressure loss, or unusual wear. Adding air does not resolve the underlying cause of a leak, and adequate tread does not rule out other tire problems.

How does RV weight affect tire safety?

An overloaded or unevenly loaded RV can overload individual tires, even when the overall weight appears acceptable.

Check more than the Gross Vehicle Weight Rating (GVWR). Stay within axle, tire, wheel, and towing-equipment limits as well.

Weigh the RV loaded for travel, including water, propane, supplies, and installed accessories. Distribute and secure cargo appropriately. Individual wheel-position weights, where available, can help identify side-to-side loading differences.

Do not exceed inflation limits to compensate for overloading.

When should you rotate or replace RV tires?

Follow the tire, axle, and RV manufacturers’ instructions for rotation. A general passenger-vehicle schedule may not suit your trailer.

Replacement timing also depends on the tire manufacturer’s guidance, condition, age, use, and storage history. Avoid treating five to seven years as a universal replacement interval or a guarantee that younger tires remain serviceable.

The last four digits of the tire’s DOT identification number indicate its manufacture week and year. Use that date when reviewing age-related guidance.

During extended storage, follow the applicable storage instructions and consider suitable tire covers to reduce sunlight exposure.

What belongs on your final tire checklist?

Before towing, confirm:

Cold tire pressure meets the applicable recommendation.
Tires and valve stems show no concerning damage.
The loaded RV remains within its weight limits.
Lug nut torque has been checked to the specified value and sequence.
The spare is ready for use.

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