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30% Off 4 Select Tires Instantly

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30% Off Tires
Receive 30% off 4 select tires INSTANTLY when scheduled for installation onPepBoys.com and installation is completed between 4/24/15 through 5/2/15. Valid on select in stock tires only, those tires for which discount is available will be identified in search results, all other tires and special order tires are excluded from this offer. Requires purchase of road hazard warranty and tire installation package which includes valve stems or TPMS reseal kit and balancing. State or local taxes and/or surcharges for environmental protections will be an additional charge. Not valid in combination with any other offers, rebates or discounts; except manufacture mail in rebates

Calculating Overall Tire Diameter

To calculate overall tire diameter, you only need the size of the tire. The formula below will help you determine the tire diameter.


Calculating Tire Diameter - Illustration

For example, if the tire size is 225/50R 16 the equation will be implemented as follows:

Calculating Tire Diameter - Formula
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