How to Determine Tire Age and at What Age Should a Trailer Tire Get Replaced

Question:

I have a 2007 Aliner Scout. It came with 5.30 x 12s and I have upgraded to ST 145/12 radials with alloy wheels. I have been told that trailer tires should be replaced based on YEARS not miles. Specifically, considering the typical use a camper gets, replacing tires about every 4 years, even if there is legal tread, is a best practice. Does this make sense to you? I know folks that replace based on treadwear and run tires as long as 8-10 years. I have seen many questions answered but they do not seem to have addressed this: what is prudent or best practice for replacing trailer tires in your view? thanks

asked by: Chris C

Expert Reply:

The common recommendation is that trailer tires should be replaced at 6-7 years of age regardless of if the tread of the tire is still good. This means 6-7 years after the manufactured date and not just when the tire was purchased.

Here's how to tell a tire's age. The DOT number code will be stamped on one side of the tire, near the bead area. This tire identification number will start with the letters DOT, then the next two numbers or letters are the plant code where the tire was manufactured. The last four numbers represent the week and year the tire was built. For example, the numbers 0410 means the fourth week of 2010.

expert reply by: Jameson C