[Z06] ? about rim size
Thread Starter
Intermediate
Joined: Oct 2006
Posts: 49
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? about rim size
if i change my rims to a 19" rear and 18" front, will i have to change the speedo gear so as to not offset the speedometer?
and is there any rubbing on the wells?
anyone running the nitto invos? curious on how they stand up wet and dry?
thanks
and is there any rubbing on the wells?
anyone running the nitto invos? curious on how they stand up wet and dry?
thanks
Melting Slicks
Joined: Jun 2004
Posts: 3,439
Likes: 6
From: Newark, DE
St. Jude Donor '06
It's the rolling diameter of the tire that matters, not the size of the wheel it is mounted on. Just stay within +/- 1% of stock tire OD and you'll be fine. In any event, there are no gears to change. The speedo correction is done by programming in the PCM. As for rubbing, it all depends on the wheel offset - my Cray 18/19s are np. No info on the Invos, sorry.
Melting Slicks
Joined: Jul 2004
Posts: 2,331
Likes: 2
From: Akron Ohio
It's the rolling diameter of the tire that matters, not the size of the wheel it is mounted on. Just stay within +/- 1% of stock tire OD and you'll be fine. In any event, there are no gears to change. The speedo correction is done by programming in the PCM. As for rubbing, it all depends on the wheel offset - my Cray 18/19s are np. No info on the Invos, sorry.
but 3% is what is widely accepted.
Melting Slicks
Joined: Jun 2004
Posts: 3,439
Likes: 6
From: Newark, DE
St. Jude Donor '06
Originally Posted by ICaughtVetteFever
3% is what is widely accepted.
you are confusing the f/r ratio with the acceptable range of OD difference.Plug the stock tire sizes into the online Tire Size Calculator and see for yourself. When you click Compare Tire Sizes it will tell you the ratio between the sizes and the speedometer difference that would result if you were to make such a size swap to the rears.
Melting Slicks
Joined: Jul 2004
Posts: 2,331
Likes: 2
From: Akron Ohio
you are confusing the f/r ratio with the acceptable range of OD difference.Plug the stock tire sizes into the online Tire Size Calculator and see for yourself. When you click Compare Tire Sizes it will tell you the ratio between the sizes and the speedometer difference that would result if you were to make such a size swap to the rears.
