Fattest Tires?

Whats the widest tires i could put in the rear end of my iroc?

Whats the widest tires i could put in the rear end of my iroc?

lol, before or after wheel well mods?

crap, i put this somewhere on the forum..... there was an issue of hot rod where they measured this out, do a quick search on tire in the forum and see what you can find. its in here somewhere.

i wanted to put maybe 11-1/2" tires, is that possible?

ok here we go by the generations, the article is from january 2002 issue of chevy hi performance, the article is titled, get a grip.

1st Generation ’67-’69 Camaro


These are reference charts only. All sizes should be verified before purchasing.

FRONT

15-Inch Wheels

Backspacing: 3.75

Wheel width: 7.0

Tire size: 225/55

16-Inch Wheels

Backspacing: 5.0

Wheel width: 8.5

Tire size: 245/50

17-Inch Wheels

Backspacing: 5.0

Wheel width: 8.5

Tire size: 245/40

REAR

15-Inch Wheels

Backspacing: 4.875

Wheel width: 8.5

Tire size: 28x10.5

16-Inch Wheels

Backspacing: 5.5

Wheel width: 8.5

Tire size: 255/50

17-Inch Wheels

Backspacing: 5.5

Wheel width: 9.5

Tire size: 275/40

2nd Generation ’70-’81 Camaro


These are reference charts only. All sizes should be verified before purchasing.

FRONT

15-Inch Wheels

Backspacing: 3.75

Wheel width: 7.0

Tire size: 225/55

16-Inch Wheels

Backspacing: 4.0

Wheel width: 8.0

Tire size: 245/45

17-Inch Wheels

Backspacing: 4.0

Wheel width: 8.0

Tire size: 245/40

REAR

15-Inch Wheels

Backspacing: 4.0

Wheel width: 8.0

Tire size: 245/50

16-Inch Wheels

Backspacing: 5.5

Wheel width: 9.5

Tire size: 245/50

17-Inch Wheels

Backspacing: 5.5

Wheel width: 9.5

Tire size: 275/40

3rd Generation ’82-’92 Camaro


These are reference charts only. All sizes should be verified before purchasing.

FRONT

15-Inch Wheels

Backspacing: 4.75

Wheel width: 7.0

Tire size: 245/50

16-Inch Wheels

Backspacing: 5.5

Wheel width: 9.5

Tire size: 255/50

17-Inch Wheels

Backspacing: 5.5

Wheel width: 9.5

Tire size: 275/40

REAR

15-Inch Wheels

Backspacing: 4.0

Wheel width: 8.0

Tire size: 265/50

16-Inch Wheels

Backspacing: 5.5

Wheel width: 9.5

Tire size: 255/50

17-Inch Wheels

Backspacing: 5.5

Wheel width: 9.5

Tire size: 275/40

4th Generation ’93-later Camaro


These are reference charts only. All sizes should be verified before purchasing.

FRONT

16-Inch Wheels

Backspacing: 5.75

Wheel width: 8.0

Tire size: 245/50

17-Inch Wheels

Backspacing: 7.0

Wheel width: 9.5

Tire size: 275/40

18-Inch Wheels

Backspacing: 7.0

Wheel width: 9.5

Tire size: 275/40

REAR

16-Inch Wheels

Backspacing: 5.75

Wheel width: 8.0

Tire size: 245/50

17-Inch Wheels

Backspacing: 7.75

Wheel width: 11.0

Tire size: 315/35

18-Inch Wheels

Backspacing: 7.75

Wheel width: 11.0

Tire size: 295/35

so to answer your question, with mini tubs in the back, you could run 11.5in wide tires.

How much does it cost on average to mini-tub the maro

no idea, but probly a few hundred bucks, seeing as there is metal work, welding, and fabrication inolved. also youd have to take out the rear suspension components to get to the area that needed to be worked on.

personally, im running the factory rims with the 245 sized tires, and they look bad ass, and have plenty of grip for traction, unless youre putting down a butt load of power, you really dont need the 11.5in tire and its going to hurt your gas mileage with the large contact area and wind resistance. (think im BSing, look at solar powered cars, 1in wide tires)

so if i get 18" rims would that hurt my performance?

so if i get 18" rims would that hurt my performance?

lol, it would be a lil bit more weight but other then that nope

I know the stock iroc tire size is awesome!! Tires are f****** huge and it does look badass!! I hate small tire sizes on certain cars, it just doesn't look right.

actually, running taller tires is the same as putting in shorter gears. so technically it will hurt your acceleration slightly but will allow you to run lower rpms on the highways. but it will be a slight change.

actually, running taller tires is the same as putting in shorter gears. so technically it will hurt your acceleration slightly but will allow you to run lower rpms on the highways. but it will be a slight change.

lol, how? if you get bigger rims you would get lower profile tires so the overall diamater of the wheel is the same?, 1 rotation is 1 rotation?

ok well yeah if you do that, but it dosnt always work out perfectly. and more often than not, especially with domestic cars, the bigger tires in the back are much taller than the factory specs. but yes, so long as you get tires with an aspect ratio that will allow your new tire/wheel combo to match the factory specs, it wont affect performance.