Maximum Tire Size for Stock 99 Explorer Sport - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 02-05-2010, 07:57 PM Thread Starter
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Maximum Tire Size for Stock 99 Explorer Sport

Hey guys my first post on here was hoping someone could recommend the biggest size tire I can put on a 99 explorer sport without any mods.

Thank you for any help you can offer.
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post #2 of (permalink) Old 02-07-2010, 01:27 AM
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Upsized tires

Generally speaking, you can upgrade the tire size anywhere from 1" to 2" on pretty much any vehicle; some will accomodate a larger size tire. What size tire does the explorer currently have? they still use the P225/75 R 15? To calculate the overall diameter do the following:

Multiply the width by the aspect ratio and multiply your answer by 2, then divide by 25.4 and add the rim diameter; this will give you the overall diameter of the tire, or at least get you in the ballpark (very close).

P = Passenger car tire
225 = Tire width
75 = Aspect Ratio
R = Radial Construction
15 = Rim diameter


225 times .75 times 2 divided by 25.4 plus 15, this is what you will get;
225 times .75 = 168.75, 168.75 times 2 = 337.5, 337.5 divided by 2 =13.287402, 13.287402 plus 15 = 28.287402; therefore the overall diameter of the tire is 28.2" - so you can easily add and inch or two if space permits!!.
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post #3 of (permalink) Old 02-09-2010, 08:03 PM
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Probably stock with 245/75R16's.

2011 Silverado 1500 Z71 with stuff. Stockish.
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