and im buying some 17"x7 rims,
are the 17" gonna throw off my spedomiter?

 

Depends on what size tire you get.

 

It most definately will, unless you go woth some wider 17" rims with a wider tire to make up the difference.. versus your stock, they only way you could go with a 17" rim (i used the tire calculator) it would have to have a 235/45/17 tire mounted on it, there fore you might need a 17x8 rim...

Hope this helps..

 

225-45-17

 

actually with more sidewall you can have a narrower tire. not that you would want that tho.
But as long as the outer diameter of the tire is the same or close to the same as your existing tire your speedometer will be right on.

 

ok, sweet, i just dont want to be doing 70 and really be doing like 100