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Max Tire Size On A18x8 Inch Wheel?

TDYE522

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TDYE522 Enthusiast

TDYE522

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I'm new to the board and own a 2008 GMC SIERRA ALL TERRAIN EDITION extended cab shortbed. I am about to order the rough country 3 inch lift and will upgrade tires as well. The kit says that the recomended tire size is a 285/65/18. But I was wanting something maybe just a little larger. The wheels are 18x8 inches. Can I fit a bigger tire on those wheels? Any help would be great.

gabet95 Enthusiast

gabet95

Posted
Posted
I'm new to the board and own a 2008 GMC SIERRA ALL TERRAIN EDITION extended cab shortbed. I am about to order the rough country 3 inch lift and will upgrade tires as well. The kit says that the recomended tire size is a 285/65/18. But I was wanting something maybe just a little larger. The wheels are 18x8 inches. Can I fit a bigger tire on those wheels? Any help would be great.

 

 

You can definitely fit MUCH bigger tires on those wheels. However you will have serious rubbing issues if you go with a bigger size than what Rough Country recommends for that specific lift.

Spurshot Senior Enthusiast

Spurshot

Posted
Posted

If you go to the tire manufacturer's website or Tire Rack .com you can read the specs for various tires and their rim width recommendations.

TDYE522 Enthusiast

TDYE522

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It really woulnt bother me if they rubbed a little. There isn't many times my wheels are at hard lock. Any ideas on what size I could get away with? Is there something that measures just under a 35 but would still be taller and wider than the 285/65/18? If I had to do slight trimming of some plastic, that would be ok too. Do they make a wheel spacer to make them stick out just a bit and maybe not rub as much? Sorry I am new to all this.

TDYE522 Enthusiast

TDYE522

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I got on tire rack and looked up the tire I would like to go with (bf goodwrench AT) and rough country says to go with a 285/65/18 and it measures 11.5 inches wide and 32.8 inches tall. After seeing a truck in person with a level lift and the 285s, I would like something a little bigger. The BFG AT in a 305/65/18 measures 12.2 wide and 33.7 tall. How much of an issue would it be to put that on the stock 8 inch rim? And what about rubbing?

jtown888 Enthusiast

jtown888

Posted
Posted

Go for the 305 for sure. Will barely rub if at all. Dont worry about the width. We have a 08 duramax and 08 powerstroke both with 325/65/18 on a 8.5 rim and have never had a problem.

If i could go back in time I would have gotton 305/65/18 instead of my 285/65/18.

gabet95 Enthusiast

gabet95

Posted
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I think I will stay away from the body lift. I do think they look better on the new trucks but still not the way I want mine to look.

 

 

TDYE522,

 

Check this website out http://www.dakota-truck.net/TIRECALC/tirecalc.html .

You can play around with different tire size and compare the width and hieght difference to what Rough Country is recommending.

 

I spent about a month looking around for the wheel/tire size for my truck. I ended up going with 285/70/17 and I think it fits my truck perfect, but then again these are 17" wheels with a 2.5" front level kit.

 

Good Luck

blackout07 Senior Enthusiast

blackout07

Posted
Posted
I think I will stay away from the body lift. I do think they look better on the new trucks but still not the way I want mine to look.

 

 

First off, a body lift would be a much safer bet than installing such a poorly designed glorified leveling kit on your nice truck. The RC 3" kit was on my truck for less than two months, before the ball joints went bad (Search for more details). I would also recommend something smaller than a 305/65. I ran 305/55/20's on my truck with a 3" body lift and 2" leveling kit and I rubbed slightly (I wasn't willing to trim).

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