Rims question
03-22-2007, 01:39 PM
#1
Racer
Thread Starter
Member Since: Oct 2006
Location: Hattiesburg MS
Posts: 267
Likes: 0
Received 0 Likes
on
0 Posts
Rims question
Hey I'm putting a set of C5 rims on my 95 Vette...which they run 17's on front and 18's on back. My question is by putting 18's on the back will it throw my speedometer of?
03-22-2007, 03:16 PM
#3
Race Director
It depends.
If you were to keep the overall tire diameter the same as it was with the 17's, then your speedometer would not be off.
You can do this by going to a lower profile tire when you move up to an 18 inch wheel.
I believe your car came with 285/40 17
285/40 17 = 25.98 inches diameter
285/35 18 = 25.85 inches diameter
The difference is only 0.19 inches. That small of difference, and you won't even notice the speedometer being off.
If you were to keep the overall tire diameter the same as it was with the 17's, then your speedometer would not be off.
You can do this by going to a lower profile tire when you move up to an 18 inch wheel.
I believe your car came with 285/40 17
285/40 17 = 25.98 inches diameter
285/35 18 = 25.85 inches diameter
The difference is only 0.19 inches. That small of difference, and you won't even notice the speedometer being off.
03-22-2007, 05:04 PM
#4
Safety Car
Member Since: Jan 2006
Location: indianapolis indiana
Posts: 3,598
Likes: 0
Received 0 Likes
on
0 Posts
if you run c5/c6 rear rims you will need spacers. i just ran into this. most guys seem to be running four front wheels and dont have to but i like the staggered look as well.
03-22-2007, 08:58 PM
#7
Elite Torch Red Member
As long as the diameter or circumference of the tire is the same, you won't have to worry about it.
The rim size has nothingto do with it.
The rim size has nothingto do with it.
03-22-2007, 09:56 PM
#8
Burning Brakes
Member Since: Sep 2005
Location: Wesley Chapel FL
Posts: 953
Likes: 0
Received 0 Likes
on
0 Posts
I switched from 17 9.5 all the way around to 17 9.5 in the front to 18 9.5 in the back and 80's Rules did the calculations for me and i would have to be going like 160mph to notice a one mile per hour difference on the speedo .......
03-23-2007, 12:04 AM
#9
Racer
Thread Starter
Member Since: Oct 2006
Location: Hattiesburg MS
Posts: 267
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for the Info....but I have 2 sets of C5 rims,...I'm gonna run 17 on front and back...that way I can rotate the tires. I have a set of 4 18's for sale for 300.00 if intersted PM me.