Posted by on 12/8/2021 to Service Recomendations
Trailer tires take all the abuse of trailering and usually don't get the attention they deserve. Most are not aware that tires have a DOT 7 year shelf life. This is due to the material breaking down over time. Trailer tires are normally stamped ST, or Special Trailer, tires are intended only for trailers. Your average passenger car (P) or light truck (LT) tire is a radial design. These tires are designed for different purposes than trailer tires.
Several things to look for when inspecting your tires:
PSI Rating - Trailer tires should be run at what is stamped on the tire sidewall. All to often we see owners inflate their tires to 30-35 PSI because that is what their car usually require. Trailers handle more capacity load per tire than cars do and when not running them at the recommended PSI it causes the tires to prematurely breakdown the sidewalls due to the heat built up in trailer applications. Typical trailer tires are rated for 50 to 80 PSI.
Date Code - This information is helpful in identifying when you should be planning on getting replacements. Every tire has a date code stamped on the sidewall, which is the date the tire was manufactured. The date code is usually at the end of the DOT I.D. and is a 4 digit number. The first two numbers indicate the week (out of 52) and the last two digits indicate the year. Example would be 3220 which identifies the tire is made the 32nd week of 2020.
Weather Cracks - Check the tires for cracks or separation which is caused by age and exposure to the elements. Usually weather checking (cracks) are found on either the inner or outer sidewalls or both. Separations are harder to identify as they are more commonly seen in the tread area. most of the time separations are seem light humps or bulges.
Tread Wear -
Inspection of tires is included in our yearly service inspection. Call our service department today to see about getting your trailer in for its yearly checkup. 253-922-0771