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the 70 series tire will be about half an inch shorter than the 75. should be no problem. Your spedometer will be about 1-2 mph faster than you are actually traveling at highway speed. In town the spedo will probably be so close that it will not matter. No, this will be more than 3% difference which is not recommended. Switch to size 225/70-15. This is less than 2% difference in diameter and will have little effect on speedometer or braking. When increasing aspect ratio, go up one size.

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18y ago

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