Tire size and speedo

So I know that changing tire size can effect the accuracy of your speedo, but in which direction?
I went from 32s to 35s, so am I actually going faster than my Speedo is showing or slower?

 

you're going faster than the speedo. for every revolution of the tire, you're covering more distance than the speedo thinks. also your computer calculated mpg will be a little off since you are also covering more ground than is used in the calculation.

 

for me, a 295/55/20 (33ish") made the speedometer exact (according to my gps).

but, yes, with 35's you will be traveling faster than what your speedo says.... maybe 2-3% faster.

 

I think I was off by 4 or 6 ish mph before the speedo healer. This was comparing to a speedo app by gps.

 

Copy that. Thanks fellas.

 

You mean
This



Or this




See....it affects your speedo!!

 

Ha.
I see what you did there.

Better clear your search history.
“Guys in Speedos” might raise some eyebrows

 

32s to 35s gives you just over 9% difference.
At 50 your just under 55. At 60 just over 65.

 

Try “fat guy in speedo” and “Batista in speedo”

Doc might be a little concerned if she searches my history LOL