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Old 06-21-2009, 07:56 PM
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Spare tire size vs stock

Ok so i thought about this in another thread but instead of a hijack i figured id start my own thread.

For as long as i can remember, all people have told me on an AWD you CANNOT mix tread or tire size in any shape or form.

My tires are going to stay at 245/65/17. But my spare is a 235/65/17. I checked it out and its slightly smaller diameter and its narrower.

The spare is a GY wrangler HP

My tires are GY Fortera HL

I plan to get new tires by winter and i will get 5 and rotate the spare in and out.

Even though i do have AAA with free 100 miles if i get a flat and have to drive my jeep with the spare on there, will i screw up my jeep?

I cannot seem to find a good used 245/65/17 fortera hl any where cept the over priced jack asses on Ebay.

any help is appreciated.
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-Kyle '05 Dark Khaki (PJT) WK Limited 4.7L V8, '08 Overland Front End, Custom Exhaust, 245/70/17 GY Silent Armors, Bilstein 4600s, K40 Calibre DL Radar Detector/Laser Diffuser, CB.
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Old 06-21-2009, 08:30 PM
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Re: Spare tire size vs stock

235/65 17 means

235 MM wide
a sidewall of 65% of 235 or 152.75 or 6.0138 inches

245/65 17 means
245MM wide
sidewall of 65% of 245 or 159.25 or 6.2697 inches

235 height =
17
6.0138
6.0138
________
29.0276

245 height =
17
6.2697
6.2697
___________
29.5394
-29.0276
_________
.5118 of an inch. or 1/2 an inch difference.

also the difference is only 2 %. IIRC you are ok up to 3%.
As a spare i think you are fine.
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Old 06-21-2009, 09:21 PM
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Re: Spare tire size vs stock

LOL....I have 20x9's in the front and 20x10's in the rear of my 4.7 quadra trac 2....youll be golden dude!
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Old 06-21-2009, 09:58 PM
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Re: Spare tire size vs stock

you have different tire sizes though. yours may actually ber closer in size than his vs his spare......
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Old 06-21-2009, 10:46 PM
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Re: Spare tire size vs stock

OK cool, Ive been real nervous that if i were to get a flat id be stranded waiting for AAA for 3 hours.

At least until i get my new tires i know i will be ok to get home.
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