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Bias Trailer Tires vs Radial Trailer Tires  

Question:

Looking to replace boat trailer tires for my 2004 Stingray 185LX. Had a Goodyear Marathon shred on me this weekend. Can you tell me the pros/cons of a bias vs. radial? Anticipate 6 or 7 trips per summer, each trip 120 miles each way, total 240 miles

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Expert Reply:

The main difference between a radial ply and bias ply tire is how the tire is constructed. The cords underneath the tire are run in different directions. On a bias tire, the cords run at a 32 degree angle from the direction of travel and on a radial tire, the cords will run at 90 degrees from direction of travel, or across the tire from wheel lip to wheel lip.

Because of the construction of a radial tire, the tire has more flex and will allow for more ground contact. That will improve traction and better tread wear. It also gives the radial tire better stability.

The radial tire will normally run cooler, if not overloaded, which will help the tire last longer, especially when the tire is under a load.

A bias tire has a stiffer sidewall and might be used more on off road applications, like farm use.

At one time the cost was a big difference from the bias to a radial, but now with both tires being close in price the radials are a much better value.

I attached an FAQ on trailer tires for you to check out also.

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Jameson C

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