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Note that the tire on one axle bends inboard while the other is forced outward. Option Two: No less than the tire's cold PSI molded on the tire's sidewall associated with max load and not exceeding the wheel/rim PSI rating for tires with a max of 85 PSI or less. If the tires currently installed on your trailer are different than the OEM label, this label no longer applies. Note: This is the max cold PSI for this OEM tire. Option One: Per the minimum tire requirement stated on the vehicle's Certification Label.
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The pressure associated with a maximum load of 85 PSI or less should be inflated no less than the PSI indicated as follows: Our recommendation for all tires on multi-axle trailers: "Interply Shear on tires in trailer application needs to be considered as this is a major contributor to trailer tire belt separations." Roger Marble
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View our list of recommend RV Weigh-masters here. Unfortunately, attempting to obtain accurate individual tire position weight is practically impossible at all truck scales. The only way to ensure tires and or axles are not overloaded is to weigh each tire position on your vehicles. It has been stated, but never confirmed by any RV Weigh-master, that there are many RVs traveling on the road with at least one tire or axle side overloaded. It is possible that mismanaged trailer load distribution will cause one end of an axle or a tire to be overloaded and could very well exceed 100 pounds on one tire. Some RV load configurations may reveal as much as 20% difference between the front and rear axle. Reports have shown that trailers do not have equal weight across all tire positions. However, we do strongly recommend weighing individual trailer tire positions for the trailer, as well as the tow vehicle or motorcoach, to ensure none of the axles or tire positions are overloaded. For trailers with max cold air pressure greater than 85 PSI, until the trailer has been weighed, never inflate less than the manufacturer label or the max cold air pressure molded on the tire.
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RV trailer owners having tires with greater than 85 PSI max rating can use the manufacturer's tire load charts available below plus add a 25% margin. We at Fifth Wheel Street no longer recommend adjusting trailer tire inflation pressure below the pressure associated with maximum load PSI rating molded on the sidewall (and only if the wheel/rim is appropriately rated) for tires that have a maximum of 85 PSI or less, regardless of the measured scaled weight of individual tire or axle positions for all multi-axle trailers.
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Selecting the Correct Tire Pressure on Multi-axle Trailers Jump to "Selecting the Correct Tire Pressure for Tow Vehicles and Motorized RVs" If a warm tire is below the normal cold pressure setting, that could be an indicator that some component may be failing. Do not correct tire inflation pressure when the tire temperature is above the ambient surroundings. Tire temperatures in direct sunlight may increase as much as 40 degrees in as little as 30 minutes, which will give you a higher than ambient pressure reading. Additionally, tires should not have been driven more than one mile or wait at least 2 to 3 hours after parking. The best time to check the cold tire inflation pressure is first thing in the morning before departure and when sunrays are not affecting the tire's ambient temperature. Step 4-RV and Tow Vehicle Tire Inflation Procedures and Load ChartsĪfter completing Step 3, the Weight Safety Report, it's important that the RV load distribution is adjusted, if necessary, and adjust tow vehicle and trailer tire inflation pressure per the current recommendations. Scale Accuracy - A Weighty Issue Revealed.What are the Benefits of Weighing Twice?.Details About Your Tires & Recalls (Offsite).34 RV Fire Facts That Can Save Your Life.NHTSA Safety Recalls - You need to know!.
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