remember smaller height tires change your mileage readings, if changed from stock size... so be ready to do some serious mathematics if you plan on calculating your mileage on a regular basis..
The math can be quite simple. All you have to do is figure out your multiplier (which will never change as long as you have those tires) and multiply your miles before figuring them in. So, for a 10% difference, you'd just multiply your miles driven by 1.1 before dividing by gallons.
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