RV Tire Maintenance

Tire Load Ratings

Load ratings for tires go up as the corresponding letter changes. For example, load range “E” tires have a heavier rating than load range “D” tires. Load capabilities of tires change as the psi (air pressure) is lowered. As much as 220 lbs. of load carrying capacity is lost per tire for each 5 psi below the recommended inflation. This decreased load amount varies from one tire manufacturer to the next, therefore it is recommended that you contact your tire manufacturer for further information in this regard.

Tire Air Pressure

When checking air pressures, if the tire has been driven more than 6 miles, you can add 4 to 6 psi to the rated maximum “cold” inflation recommendations. For example, if the tire has a maximum rating of 90 psi cold, you can inflate the tire to 96 psi after being driven on. A tire’s worst enemy is under inflation. It generates excessive heat, increases tread wear in the shoulder area, and reduces the vehicle’s fuel economy. Never mix radial, bias belted or bias type tires. Never mix brands. This can adversely affect vehicle handling and stability. Use only the tire size that is listed on the Safety Compliance Certification Label. Please refer to the Federal tag for proper tire air pressure for the RV. Under inflation results in unnecessary tire stress, irregular wear, loss of control and accidents. A tire can lose up to half of its inflation pressure and not appear to be flat.

For more tips about RV maintenance and service, contact Mike at mikeb@rvglass.com

or call (800) 551-9149 ext. 2030