How much will my speedo be off?

5LiterFever

New Member

Dec 24, 2003

134

0

0

Alexandria, VA

Apr 1, 2004

#1

• Apr 1, 2004

• #1

This week I will be taking the stock 16" wheels with 225/55 tires off my 95 GT and replacing them with 17" wheels (stock 98 cobra wheels) with 245/45's. How much will my speedometer be off by? Stock gears btw.

 

rio95

Member

Nov 18, 2003

829

1

17

Grand Rapids, MI

Apr 1, 2004

#2

• Apr 1, 2004

• #2

those are the same outside diameter (pretty close), so it won't be off. i used to have 16" waffles and now i have 17" and i never had any prob. with the speedometer.

 

Ryan Paterick

New Member

Dec 4, 2001

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Apr 1, 2004

#3

• Apr 1, 2004

• #3

When you switch to 3:73's, Oh yes you will! Your speedo will be way off. I've heard either get the 23 tooth speedo gear or a SpeedCal.

BTW, love the color scheme on the car.

 

jmuva44

Founding Member

Nov 25, 2000

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36

Richmond, VA

Apr 1, 2004

#4

• Apr 1, 2004

• #4

yeah I think that those two tires will be the exact same diameter so everything will stay the same.

 

rio95

Member

Nov 18, 2003

829

1

17

Grand Rapids, MI

Apr 1, 2004

#5

• Apr 1, 2004

• #5

i don't see him talking about 3.73's anywhere??????????????????? he's just talking about tires.

 

Ryan Paterick

New Member

Dec 4, 2001

943

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Apr 1, 2004

#6

• Apr 1, 2004

• #6

rio95 said:

i don't see him talking about 3.73's anywhere??????????????????? he's just talking about tires.

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I know, I just put that in there so he didn't have to ask when he put in new gears.