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Old 03-18-2014, 01:21 PM
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WK tire size and spare tire size ideas and questions

Like a lot of viewers on this forum, I'm trying to decide what size tire for my JK Moab rims on my 06 WK.

I spent a lot of time to figure out that 265/70R17 and 255/75R17 will fit the WK with Moabs lifted or not with potentially rubbing on the inner frame of the front tire at full lock. FYI - Moabs wheels give net gain 1/4" space to UCA bolt due to 1/4" less offset compared to factory WK rims. If no inner fender rubbing with 1/4" spacer, then I may grind the brake caliper and see if I still get rub with no spacer. I am going with Duratracs so I will probably need that extra 1/4" for the aggressive side walls. I don't expect that I will need pinch weld mod but expect to trim the UCA bolt because "why not".

If not lifted, will 265/70R17 rub when stuffing the tire off road?
If OME lifted, will 265/70R17 rub when stuffing the tire off road?
If not lifted, will 255/75R17 rub when stuffing the tire off road?
If OME lifted, will 255/75R17 rub when stuffing the tire off road?

I have been investigating what is the max spare tire size for a WK also. 3% or less diameter difference needed for QDII happiness. Hitch mod assumed.

I have seen more than once that a 265/70R17 will fit the spare location.
Does anyone know if that is a new tire and fully aired?
I was thinking a 50-75% used 265/70R17 fully aired would fit for sure.

I have seen on the forum that 255/75R17 will NOT fit the spare location. So I came up with ideas if I want to run that size.

Use a 50-75% USED 255/75R17 tire for the spare?
255/75R17 ~32.06" new (16/32)
255/75R17 ~31.6" @ 50% tread (8/32) - same as new 265/70R17
255/75R17 ~31.3" @ 25% tread (4/32)

Another idea:
To compensate for a smaller spare, you could measure the mounted spare wheel center to ground and then air down the opposite side tire so the height is similar. Comments?
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Old 03-18-2014, 05:39 PM
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Re: WK tire size and spare tire size ideas and questions

I've been trying to figure out the same thing only with the 18" stock wheels.

I'm looking at 255 and 265 tires as those are the closest to the stock 245's I already have but I'm looking for all terrains, not highway or all seasons.

My biggest question has been do I need a lift or not. So far I haven't been able to find an answer.
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Old 05-25-2014, 07:46 AM
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Re: WK tire size and spare tire size ideas and questions

if you dont do you pinch weld mod you will for sure rub lifted or not, and a 265/70 will fit in the spare with the hitch mod and the tire being aired down
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