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Monday, October 19, 2015

How to recognize what might be a better tire to consider buying for your trailer application?

Something to consider when shopping for tires for your trailer:

- Many tires have essentially no warranty, others maybe 12 months and some for years. In my opinion (IMO) the length of time the tire company is willing to stand behind their products is one way to judge the real quality of what they make. Which would you consider a better deal: a hammer with a 30-day warranty for $5, or one with a 10-year warranty for $10?

- Speed rating molded on the tire sidewall to me indicates the manufacturer has made a real effort to exceed the minimum performance requirements from DOT. IMO, tires with a speed symbol are probably better than those without a speed rating.

- Here is a chart to convert the speed symbol letter to a number.

- The speed symbol letter is part of the service description which comes right after the rim diameter in the tire size. Technically, an "LT235/75R15 107/110 Q Load Range D"  is a different tire than an "LT235/75R15 Load Range D" -- with the 107/110 being a load index for dual and single application and the letter Q being the speed symbol.

- I note that most LT tires made today have a speed rating, but when applied to trailer application, some companies say to consider 75 mph as a max.

- I also have recently seen a few ST-type tires now being manufactured with a speed symbol which IMO would make them probably a better choice than tires without a speed symbol.

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