I just put on 315-70-17 Duratracs on my 3.73 JKU. What size should I be setting the tire size for? 34.5? Also, is there anything else I should be changing at the same time?

 

34 most likely if you aren't going to run max pressure

 

Overall height may vary tire to tire along with wheel width and tire pressure. So Please measure your front tire height from the ground to top of the tire while the jeep parked on fairly flat surface.

Do not key in the direct conversion.

I am running the same 315/70R17, the actual measurement is 33.5" from the ground with 30 psi and that's what I set my procal too. I confirmed with my gps and it's dead on.

 

X2 on this. Did the same thing and am right on also. Every brand of tire is a little different and the tire pressure makes it different again so measure to get it right.

 

Will do. Thanks guys.

 

I still need to re-adjust my procal. I swithed from 35" mtrs for 315 duratracs for the winter. I'm sure my speedo ain't off by much, but i'll still adjust it.