i just got mine ups today. i HATE the thing already. i have 35's and its like i have to enter 38's into the thing to get my speedo right. ive been checking my speedo against my gps. so either the gps is wrong or the tirepaq sucks. does anyone else have similar problems with this thing? or can anyone else recommend something better around the same price range??

 

Mine worked fine.. Maybe you got a bad one? I'd call them and check.

 

You sure you have 35" tires?

What does the size say on the sidewall? Give me the whole number...

 

325/65 R18

under that it says OD 35.00 / Sidewall 13.50

 

Ok, just making sure...

I own a tire shop and i've seen a lot of times when customers don't understand what the numbers mean...

 

i never ment I had 35" I have 305s... Which I know is just under 33. Best of luck to you.