GEN 2 FORscan question

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Wayne Lee

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I hope I am posting this in the correct location. If not, please let me know.

I have replaced stock wheel/tires on my truck with aftermarket and I need to determine the correct values to use in FORscan for the speedometer to be correct.

Old wheels/tire set up (STOCK): 315/70/R17
New: 33/12.5/R20

I know this is a smaller set up, but I just got these wheels and tires and had them on my 2018 XLT [sold that truck to get this one, but returned to stock wheels before selling].
My goal, in the near future, is to go to 35 x 12.5 x 20, but for now I will use this set up.

Thank you.
Wayne
 

Ski4Ever

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As much as it pains me to hear that you put a smaller tire with larger wheels on your Raptor, have you looked at the "Tire Size Values" worksheet in the Forscan spreadsheet? A couple users reported values for a 275/70R18, which is pretty close to a 33" tire.
 
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Wayne Lee

Member
Joined
Jul 4, 2020
Posts
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Location
Sumter, SC
As much as it pains me to hear that you put a smaller tire with larger wheels on your Raptor, have you looked at the "Tire Size Values" worksheet in the Forscan spreadsheet? A couple users reported values for a 275/70R18, which is pretty close to a 33" tire.


Thank you!

I will be stepping up to either a: 325/60 R20 OR 35x12.5 R20 in the future.
 
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