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Discussion Starter #1
What size spare tire did you get if you ordered one for you R/T with 20" wheels/245/45R20 tires??? I forgot to order one.
Thanks!!!
 

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Hi, I have those same size tires on my SXT and my spare tire size is145/80/18. Hope this helps you out. B-
 

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Discussion Starter #3
Thank You!!! Will this size work with a posi rear end. The spare, T145/80D18, is a little over 1" smaller diameter. Or if you have a rear flat, do you have to do the two tire change thing.
 

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Well keep in mind that this spare tire is only meant to be temporary. And if you have 20 inch rims now this is 2 inches less diameter. I don’t think it will affect the posi if you have to run it on the rear since I’m guessing you’re not going to horse it until you get a replacement tire.
 

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Discussion Starter #5
Spare temp only. Yep. I've found that a T155/85r18 spare tire is 28.4" tall that is the same size as the 245/45r20. I like looking for info.
 
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