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rustyMUD · 12-19-2012, 08:07 PM

You should be fine running the 255/85r16 BFG Mud Terrains on a stock one ton. I have the exact same tire on my 81 GMC K25. It has the HD(8,600 lb gvwr) suspension which currently is sagging a bit due to broken springs from previous owner neglect. I have no rub issues, even at full lock and also flexed off road. I use the truck to haul firewood and have had just shy of 3,000 lbs of logs in the bed with no rubbing issues in the rear, again, that's with the saggy springs. My brother owns an 84 K30 and it has an additional one or two inches of axle to wheel-well height over my 3/4 ton. In summary, you'll be fine with no modifications to the suspension. It's good to see someone else interested in 255/85r16. I'm a big fan of that size, especially on the 73-87 trucks.

12-19-2012, 08:07 PM	#6
rustyMUD Registered User Join Date: Sep 2009 Location: Houghton, Michigan Posts: 14	Re: Lift Required for 33" Tires on K30? You should be fine running the 255/85r16 BFG Mud Terrains on a stock one ton. I have the exact same tire on my 81 GMC K25. It has the HD(8,600 lb gvwr) suspension which currently is sagging a bit due to broken springs from previous owner neglect. I have no rub issues, even at full lock and also flexed off road. I use the truck to haul firewood and have had just shy of 3,000 lbs of logs in the bed with no rubbing issues in the rear, again, that's with the saggy springs. My brother owns an 84 K30 and it has an additional one or two inches of axle to wheel-well height over my 3/4 ton. In summary, you'll be fine with no modifications to the suspension. It's good to see someone else interested in 255/85r16. I'm a big fan of that size, especially on the 73-87 trucks.