Offset For 285 65 18

billyboy2 · April 13, 2011

Tomorrow I'm buying these size tires and also getting aftermarket wheels. I dont want the stock +30 offset but i'm looking to either get the +18 or the -12 and I would love the -12mm but concerned about clearance.

I have a 2" leveling kit and dont mknd trimming a little plastic.

Has anyone ever ran this setup? If I have no chance with the -12 I'll get the 18mm

Stevens03 · April 13, 2011

Thats 32.6" and only .7" over stock tire size. The only concern I'd have is the 4.75" of backspacing you have. The GMT-900's take a little more backspacing than the GMT-800's do. You should be fine but it will be close. Also, the GMT-900's have a smaller tire opening than the previous model, so more lift is required to fit the same tires as before. With the 285's, 2" level/lift and the correct backspacing you shouldn't have any trouble.

5.5" to 5.75" of backspacing would be better for a perfect fit.

billyboy2 · April 13, 2011

Thats 32.6" and only .7" over stock tire size. The only concern I'd have is the 4.75" of backspacing you have. The GMT-900's take a little more backspacing than the GMT-800's do. You should be fine but it will be close.

5.5" to 5.75" of backspacing would be better for a perfect fit.

So Mainly if I would need to trim it would probably only be the front valance ? and not the bumper cover itself cuz that would be rediculous

Stevens03 · April 13, 2011

Thats 32.6" and only .7" over stock tire size. The only concern I'd have is the 4.75" of backspacing you have. The GMT-900's take a little more backspacing than the GMT-800's do. You should be fine but it will be close.

5.5" to 5.75" of backspacing would be better for a perfect fit.

So Mainly if I would need to trim it would probably only be the front valance ? and not the bumper cover itself cuz that would be rediculous

Member NickS is running that tire size without issue.

http://www.gm-trucks.com/forums/index.php?...mp;hl=285-65-18

Member SierraRR is running those tires with 2" RC lift

http://www.gm-trucks.com/forums/index.php?...=104431&hl=

And no cutting of the bumper would be required. If you rubbed, most likely it would be a hair in the rear inner plastic fender at most.

billyboy2 · April 13, 2011

That's good to know...But would it make a difference if I purchase nitto mud grapplers??? That's the tire I really want...Love the aggressive look!!

Stevens03 · April 13, 2011

The overall tire diameter does vary a little between makers, but not really enough to worry about I think. The nitto's are a very popular tire. Post photos

billyboy2 · April 13, 2011

Thanks for the great help...I made my mind and Getting the 285/65/18 Trail Grapplers with the -12mm offset moto metal 951 wheel......Ordering first thing in the morning

Thanks again Stevens11

Stevens03 · April 13, 2011

I like the moto metal 951's. Great looking wheels.

NickS · April 13, 2011

Im running Eagle Alloys series 178 in 18"

They are +2mm offset and 5 bs.

I ran 285/60/18 Toyo Open country easily with just a 2" leveling kit, and I now have 285/65/18 Nitto Grapplers put on there last friday. I think they could have fit also with the 2" leveling kit without trimming, but it looks like it could have been close. They fit fine with the 4" of lift I'm running now.

Cbarnett1 · April 13, 2011

Thanks for the great help...I made my mind and Getting the 285/65/18 Trail Grapplers with the -12mm offset moto metal 951 wheel......Ordering first thing in the morning

Thanks again Stevens11

post pics! i just got the trail grapplers and am ordering the moto metal 951 in the +18mm offset

billyboy2 · April 13, 2011

will do!!!

WORICP · April 14, 2011

will do!!!

I dont know how good my word is but I just bought tires like this. I am trying my best to get out of them. I would really suggest test riding them before buying

Redneck56 · April 15, 2011

Im running 285 65 r18 nitto trail graps with a 2" rc level kit with +20 offset wheels and the tires barely clear. they used to rub on the mud flaps like crazy so i had to put on molded ones and still cut and trim them to clear. i think a-12 would rub like crazy but im not sure.