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Discussion Starter · #1 ·
I believe I asked a variation of this question before, but after talking with a friend of mine have a more specific version.

I am in the process of getting some new tires and would like to go a little narrower (if thats a word). I currently have the following on the truck now:

ProComp Xterrain A/T
325/65/18 (which I believe is the equivilent to 35/13.5/18)

Im currently looking at a set of Nitto Mud Grapplers in the following size:

35/12.5/18

My question is this; first, if these two brands of tires were exactly the same size is there any difference? Sometimes tires "run big" or "run wider" etc. so i was wondering if this is the case with these 2 brands.

Secondly, will there be any issue with downsizing to the 12.5? The wheel will obviously stay the same so not knowing much about tires/wheels I was wondering if this a) is even possible, and b) if it is possible, is there any harm in doing this.

As always, thanks in advance for any info!!
 

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Youll be fine. Look at specs though on each companies website to actually see their true specs. I ran 12.5s with 12s for a long time and I will in the future. One thing though, those mud grapps are expensive and dont wear good at all. Im a swamper man and would say get iroks around that size but thats just me.
 
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