37 in Tires Procal Calibration

[B-Dot]

I have a 4 door 24 wildtrak. Getting 37in nitto ridge grapplers installed tomorrow. What revs per mile do I have to input on the procal? I saw how many for KO2 but are the ridge grapplers different?

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[JL8jeff]

I would say to check your speedo against speed traps before doing any changes. My base Sas was reading high with the stock setup. I went to the KO2 37's and now it's spot on so I didn't change anything with the Procal. That also tells me my original mpg's were a bit optimistic.

 

[Mdsuits]

A lot of companies are starting to put that info in the tire specs online. You should be able to find your answer with a quick search.

 

[Brian_B]

Get a GPS Speedometer for your phone?

I was able to dial in my 38" Nittos to be dead on at 75mph. Now maybe my phone app isn't 100% calibrated, but it's likely close enough

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