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Re: Any problem with using smaller overall diameter tires than just wrong speed readout?
205/70/15 are passenger car tires. They are smaller than the tires on my Grand Prix.
Not only are they shorter (26.3" vs 28.9") but they are over 1" narrower.
Being they are going to be passenger car tires the load index is not going to be as much as it would be for a light truck tire. The difference is going to be as much as 500 lbs PER TIRE and could be more. This alone could cause a failure while driving.
There is no reason to put tires that small on a truck, no matter what you think the driving conditions will be.
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