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Old 05-02-2012, 06:50 PM
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Different size spare tire

I have a question concerning my sre tire in my 2011 Jeep Grand Cherokee Limited. I just upgraded to 20" stock mopar wheels with the Good Year Fotura tires. My spare is a left over stock 18". If I have to put the spare on will it do any damage? Different size spinning at different speeds etc..
Should I just get a 20" spare wheel/tire combo at a junkyard to cover me.
I have the tire and wheel protection package and I take very good care of my vehicles. Can't remember the last time I got a flat but you nevr know.
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Old 05-02-2012, 06:58 PM
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Re: Different size spare tire

Rim size doesn't matter check the rolling diameter of the tire.

They all have to be the same or it will do damage.

Post up what size tires are on the 18's and the 20's
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Old 05-02-2012, 07:25 PM
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Re: Different size spare tire

None of them come with a 20" spare. I doubt it would even fit in the well.
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Old 05-02-2012, 08:03 PM
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Re: Different size spare tire

My 18" were Michelins p265/60r18 and the 20" are Good Year Fotura HL 265 /50 20.
Is there a full size spare? I have no idea what size my spare is.
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Old 05-02-2012, 08:29 PM
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Re: Different size spare tire

I'm pretty sure there is a full size spare, but I'll let an expert confirm.
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