[C!ph3r]

I am looking to run a 225/40 18 on a new set of wheels. seeing that the stock is 40r17 and i am going to a 40r18, how far off is this going to put my speedo?

 

[zoltiz]

1.9%

when speedo shows 60, you'll be travelling at 61.1mph

 

[C!ph3r]

Ok Cool. Thanks for the input.

 

[lo bux racer]

Stock isn't 40/17 it's 215/45/17, but Z's calcs are correct for stock vs. 225/40/18.