Need help on tire size
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,144
Likes: 18
From: Panhandle FL
Need help on tire size
I bought a used C5 that has the C6 5 spoke alloy rims. It has the Nitto DR tires. I'm trying to find the correct size for 18x9.5 rim. Is it 275/40/18 or something different. I want a meaty look , the C4 that I sold had 17x11 ZR1 rims on the back. That was some meat.
Melting Slicks
Joined: Nov 2009
Posts: 2,922
Likes: 219
From: West Branch, MI
18x9.5" rim stock tire was 275/40/18. You can however put up to a 295 on them but they'll have a slight bulge. I have the 18x9.5" C6 chrome replicas on mine and have stock size Nitto 555s on them. However, I just had some engine work done and the Nittos won't hook, so I ordered the same C6 chrome replica in 18x10.5" size and going to put on some Toyo Proxes TQ 315/35/18.
Racer
Joined: Mar 2011
Posts: 420
Likes: 13
From: West Deptford NJ
Stock Sizing
Front wheels are 17" x 8.5" with +58mm offset and backspacing is 7". Total wheel width is 9.5". Rear wheels are 18" x 9.5" with +65mm offset with and backspacing is 7.5". Total wheel width is 10.5".
Note the front and rear tire size diameter below. You should stay as close as possible to the one inch difference in diameter of the front and rear tires
(stagger) to avoid any possible problems with active handling.
stock
245/ 45 -17 25.7" diameter 4.3" sidewall
275 /40 -18 26.7"diameter 4.3" sidewall
Stagger 1"
295/ 35 -17 26.1" diameter *4.0" sidewall
255 /40-18 25.0" diameter *4.1" *sidewall
Stagger 1.1"
255/45-17 26.1" *diameter 4.5" sidewall
285/40-18 27.0"*diameter 4.5" sidewall
Stagger .9"
255/40-17 25.0"*diameter 4.0" sidewall
285/35-18 25.9"*diameter 3.9" sidewall
Stagger .9"
Little lower profile for looks and a touch wider.
but realize, not all brands have the same tread width...... e.g., a Bridgestone PP or a Kuhmo MX have significantly wider tread than, say, a Goodyear D3.
go to the tire rack and check out the specs
I would not go much wider than a 285 on the rear tire, pushing the stock rim width size a little. Also watch the sidewall or profile height. You may not like too low or too tall of a profile or a different profile size from front to rear.
Here is a handy tire size calculator I think I picked up on Toque's website.
http://www.rimsntires.com/specs.jsp
Personally I went with Nitto Invo in stock sizing
*
Front wheels are 17" x 8.5" with +58mm offset and backspacing is 7". Total wheel width is 9.5". Rear wheels are 18" x 9.5" with +65mm offset with and backspacing is 7.5". Total wheel width is 10.5".
Note the front and rear tire size diameter below. You should stay as close as possible to the one inch difference in diameter of the front and rear tires
(stagger) to avoid any possible problems with active handling.
stock
245/ 45 -17 25.7" diameter 4.3" sidewall
275 /40 -18 26.7"diameter 4.3" sidewall
Stagger 1"
295/ 35 -17 26.1" diameter *4.0" sidewall
255 /40-18 25.0" diameter *4.1" *sidewall
Stagger 1.1"
255/45-17 26.1" *diameter 4.5" sidewall
285/40-18 27.0"*diameter 4.5" sidewall
Stagger .9"
255/40-17 25.0"*diameter 4.0" sidewall
285/35-18 25.9"*diameter 3.9" sidewall
Stagger .9"
Little lower profile for looks and a touch wider.
but realize, not all brands have the same tread width...... e.g., a Bridgestone PP or a Kuhmo MX have significantly wider tread than, say, a Goodyear D3.
go to the tire rack and check out the specs
I would not go much wider than a 285 on the rear tire, pushing the stock rim width size a little. Also watch the sidewall or profile height. You may not like too low or too tall of a profile or a different profile size from front to rear.
Here is a handy tire size calculator I think I picked up on Toque's website.
http://www.rimsntires.com/specs.jsp
Personally I went with Nitto Invo in stock sizing
*
Last edited by jlaw1313@comcast.net; Jul 29, 2013 at 06:01 AM.
