18 inch Wheels all around
Thread Starter
Team Owner
Joined: Mar 2004
Posts: 58,500
Likes: 1,825
From: Oklahoma City OK
C6 of Year Finalist (appearance mods) 2019
18 inch Wheels all around
I'm getting new wheels for my C5 Coupe and have decided on 18" wheels all the way around. The fronts are 18 X 8.5 and the rears are 18 X 9.5. I'm planning on keeping the stock size P275/40 ZR 18's in the back and I'm confused on what size tire to put on the front to keep the right look! What would be right size to run upfront?
Last edited by jrose7004; Feb 5, 2007 at 09:58 PM.
Le Mans Master
Joined: Sep 2000
Posts: 6,100
Likes: 43
From: ABQ NM
Cruise-In II Veteran
Use a calculator such as this,
http://www.miata.net/garage/tirecalc.html
in conjunction with the tire mfr's wheel width recommendations.
http://www.miata.net/garage/tirecalc.html
in conjunction with the tire mfr's wheel width recommendations.
Race Director
Joined: Aug 2003
Posts: 16,270
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From: "It's 106 miles to Chicago, we've got a full tank of gas, half a pack of cigarettes, it's dark, and
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-‘18-'19
NCM Sinkhole Donor
Since you are not going any wider than stock - the widest tire you can fit is a 255-40x18. That tire 26" tall, so you might consider a 255-35x18 which is 25" tall and will better maintain the stagger with the stock size.
But why are you limiting yourself to these sizes?
BTW - my source of information is the Michelin web site....
http://www.michelinman.com/specs/pil..._ps2/2958.html
But why are you limiting yourself to these sizes?
BTW - my source of information is the Michelin web site....
http://www.michelinman.com/specs/pil..._ps2/2958.html
Burning Brakes
Joined: Oct 2006
Posts: 1,146
Likes: 10
From: Boise Idaho
St. Jude Donor '07
I almost bought a set of 18x8.5 front and 18x9.5 rears today. After a ton of research and help from other CF members, I've decided to keep the 17's front and 18's rear. I figure GM did it for a reason also, give the cars a slight sloped look.
If you are going to go 18's all the way around, put some 245/40/18's up front, they're the same size as the stock 245/45/17's.
If you are going to go 18's all the way around, put some 245/40/18's up front, they're the same size as the stock 245/45/17's.
Burning Brakes
Joined: Oct 2006
Posts: 1,146
Likes: 10
From: Boise Idaho
St. Jude Donor '07
Ohh, and by the way, this is for everyone... this is the coolest tire size calculator I have found. Let me know if you have a better one.
http://www.miata.net/garage/tirecalc.html
http://www.miata.net/garage/tirecalc.html
Racer
Joined: Jul 2002
Posts: 371
Likes: 38
From: Madison Alabama
I'm getting new wheels for my C5 Coupe and have decided on 18" wheels all the way around. The fronts are 18 X 8.5 and the rears are 18 X 9.5. I'm planning on keeping the stock size P275/40 ZR 18's in the back and I'm confused on what size tire to put on the front to keep the right look! What would be right size to run upfront?
I'm running 18's all around also, but I have 18x9.5 front and 18x11 on the rear.
I'm running 265/35x18 tires on the front and 295/35-18 tires on the rear. No problems. . .
Ciao,
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Burning Brakes
Joined: Oct 2006
Posts: 1,146
Likes: 10
From: Boise Idaho
St. Jude Donor '07
Could some of you guys with 18's all around post some side pics. I was going to order the 17's and 18's but if the 18's all around look good, I might just stick with those.
