How do I know what size tires will fit on the rims on my truck?

Discussion in 'The Garage' started by James2k, Nov 25, 2007.

  1. James2k

    James2k Senior member

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    I've got a 1988 Ford F-150 that came stock with 215/75R15 tires on it. Problem is, I can't find LT tires in this size, and the P tires reccomend a low pressure (35psi), and they sag pretty good under the engine weight. I got a pair of rims and tires for the rear, LT235/75R15, and I was wondering if anyone knows how to find out if another pair of this size, will fit on the stock rims? If need to do measurements or something, I can and will. Please let me know
     
  2. alimoalem

    alimoalem Diamond Member

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    i was under the impression the first number (235) is millimeters width of tire, the second number (75) determines height (in this case 75% of 235mm ~= 176mm), and the last number (15) is rim size.

    is that what you're asking for?
     
  3. boomerang

    boomerang Lifer

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    Go to http://www.tirerack.com/ and plug in the particulars of your truck.

    The 235's are only 10mm wider. I can't imagine you'll have problems putting those on your current wheels.

    Tirerack shows 215 as standard and 235 as optional.