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03-27-2010, 11:24:51 PM
Whats the widest tire you can put on a 15x7 Z28 rim with a stock 1972suspension. Thank you for your thoughts.

03-27-2010, 11:29:47 PM
Are you going for looks or performance? A 255/60/15 on a 15x7 is really pushing it. I have run BFG 255/60/15s on 15x7s and the tires do not wear evenly and the sidewall flex was pretty excessive. A 15x7 is not really a good wheel size to be trying to fit wide tires on, it's just not a wide wheel to start off with.

03-27-2010, 11:35:07 PM
Going for looks. I like a wide looking tire in the rear. Can't run with the big dogs now, on a budget. Would like to get 17's one day, but that will be a while. What about the front as well?

03-27-2010, 11:38:20 PM
255/60/15 is what I would (begrudgingly) recommend then. That is the absolute max I would put on a 15x7 if someone had me mount it

03-27-2010, 11:47:17 PM
I run 255's on the back of my car with 15" z rims with no problems at all. 245's in the front

03-28-2010, 01:11:39 AM
I have a 31x10.5 on a 15x7 rim. :D

muscl car
03-28-2010, 02:22:34 AM
i'm running 28-9.0/15 hoosier racing slicks mounted on a set 15x7 corvette rally wheels

03-28-2010, 09:06:39 AM
Thanks everyone for your input! John

03-30-2010, 10:28:08 PM
Hey once you put the 255's on the back!! You'll be wanting to go to an 8" rim and 275's or bigger!:crazy:

03-30-2010, 10:35:54 PM
I ran 265/50s on the stock rally wheels. On all 4 corners. Worked pretty well but there was a lot of sidewall.

03-31-2010, 10:53:22 AM
I have 275/60 drag radials on mine and it does flex quite a bit. If you're going for looks it would work, you will just need to adjust your driving style. FWIW, the tire manufacturer recommends an 8" wheel for my 275 tire.


03-31-2010, 11:09:19 AM
I have always used 245/60/15's on all 4 corners.


03-31-2010, 11:24:19 AM
I've got BFG Radial TA 275/60/15's on the rear with 15x7's.


03-31-2010, 12:49:41 PM
I've got BFG Radial TA 275/60/15's on the rear with 15x7's.


I like that...though my car is totally stock, i like how it fill up the wheel wells.

03-31-2010, 12:54:29 PM
x2. nice looking ride

03-31-2010, 04:08:23 PM
I had 275/60r15 on my 73 when I first got it.

03-31-2010, 05:05:11 PM
you could put a P 29,000 width on there if they made it and you tried hard enough but when you are running anything that wide sucked that far into a narrow wheel you are not making good use of the carcass and tread contact area so you might as well run a narrower tire.

03-31-2010, 05:59:58 PM
i think 265/60r15 is perfect but i don't think BFG T/A comes in that size.

03-31-2010, 10:20:54 PM
I have a 31x10.5 on a 15x7 rim. :D

:) Had you beat.....I had 33x12.5x15's on some 15x7 rims on a 89 Ford Ranger 4x4....lol. Transmissions wouldn't stay for long :screwup:....lol.

04-01-2010, 12:05:36 AM
275/60/15 looks best on the 7 inch z wheels

04-01-2010, 12:07:39 AM
I have 275/60/r15s on my n90s on the T top car, and had a set of them on the spare draglite 15x7 3.5bs wheels that we had on my gold car for a while before we went 15x8 4.5bs.

04-01-2010, 11:37:25 PM
dwright406, nice ride. What's size is up front.

Thanks to all for your input. I decided to go with 275/60 in the rear and it fits perfect for me.

04-02-2010, 10:13:18 AM
dwright406, nice ride. What's size is up front.

They're either 245/60's or 255/60's. I'll have to check and get back to you.

04-02-2010, 11:59:15 PM
I ran 255-60R 15 all the way around once..fronts would rub if I wasn't careful. Before that I ran 245's all the way around with no problems...when Daytona stopped making the 245's was when I tried the 255's. Best ride I got was 235's on the front and 255's on the back...I got miles, lots of miles on a set of tires...rotated my tires side to side, kept good shocks on the car, and kept the front end aligned.

Rene Melten
04-03-2010, 12:12:07 AM
Agree, 235-60r x 15 x 7 up front and 255-60r x 15 x 8 out back.

04-03-2010, 12:34:59 AM
yeah, done the same myself, 235/60 out front, 255/60 out back. I would not go any larger than 255's on a stock rim, handling will be affected.