17" tire/wheel help

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Apr 21, 2010 | 08:37 PM

JJ3

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17" tire/wheel help

Hello, looking for some help on a wheel/tire combo. My truck is a 94 f150 ext cab 2wd. I have a 2" drop shackles for the rear on the way to level it out and found a set of mickey thompson classic 2's used. The wheels are 17x9 with 4.5" backspacing. I want to know if anyone has experiance with this wheel, and what tire would be equiavlent to the 235/75r15 im running now, maybe a 275/55 ? Also want a standard, cost effective size....no oddball. Any help would be great. Just going for a sporty look that fits the truck, not a low rider. Here is the wheel...

Mickey Thompson 379402 - Mickey Thompson Classic II Wheels - Overview - SummitRacing.com

Thanks

Apr 21, 2010 | 10:07 PM

Hitokori

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a 235/75r15 is about a inch taller than a 275/55r15 but since ur going with a 17 inch rim the aspect ratio will be different thats the 55 part....

Apr 21, 2010 | 11:20 PM

mstngmikegt

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From: Iowa

Based on some quickie math...the 275/55-17 (28.91" tall) should be an almost exact match for the 235/75-15 (28.88" tall.) Don't know if that is a standard size 17 or not though? Even metric tires can vary between manufacturers though, so best to make sure (most mfgs have posted diameters available.)

Apr 22, 2010 | 04:58 AM

JJ3

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Ok, thanks. What equation was used to get your answer? I found some 265/65's for a good deal local but im afraid they will be too tall or narrow? Im going for this look....

Quote:

Originally Posted by Diesel_Brad

94 Lightning lowered 2" Gen 2 wheels 275/55 tires, cowl hood, rollpan, Shelby stripes, Bassani headers+exhaust,CAI, under drive pullys

My truck is just going down 2" in the back, but has settle enough to be very similar in ride height (+1"). Also, what are the specs on the 2nd gen lighting rims? size x widthx backspace?

Apr 22, 2010 | 10:52 AM

Hitokori

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Tire size calculator this link will let u put in 2 different tire sizes to see the different height and width.... i have 2" drop shackles on my truck from djm but i dont have any pics up with them on it

Apr 22, 2010 | 05:52 PM

JJ3

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thanks man, show some pics please.

Apr 22, 2010 | 05:55 PM

Hitokori

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xD i have to take some first... but i need to wash it and get tags back on it because they expired while i was in ft. bragg lol but ill get some soon....

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Apr 24, 2010 | 02:38 PM

mstngmikegt

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From: Iowa

The math is easier than most people think. Take 255/60-15 for example. 255 is the section width of the tire, in mm. 60 is the aspect ratio (meaning that the sidewall height is 60% of the tire's width.) So the math works out that the sidewalls are 255X.60 tall (153 mm.) To convert that to inches, since there are 25.4 mm per inch, divide by 25.4. Gives you 6.02 inches tall per sidewall. Since you have 2 sidewalls, the total height is 2X6.02 plus the diameter of the wheel (15 inches.) Total height is then 12.04+15 or 27.04 inches tall. This will get you very close on any P-metric sized tire without having to find a listing for it.

Even though metric sizing is supposed to make things uniform amongst manufacturers, it is best to check diameter listings from the tire manufacturer to get it exact for a particular tire (and to double check your math once you have stuff narrowed down.)