Lift and tire question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

teepaw · 04-25-2016, 11:53 AM

I recently bought a 79 gmc k20 longbed that has been lifted with a 6" suspension lift and a 3" body lift with 37" military tires. If i remove the body lift will my truck still clear the tires without much rubbing until i can afford to get new wheels and tires. It wont be used for offroading other than the minor things like just driving through fields for hunting.

Thanks

liftlawssuck · 04-26-2016, 10:40 AM

Can't believe no one chimed in here yet. I had the same lift as you but was running 38.5 Gumbos. After taking the body lift out the tires would hit when turned. These trucks need lift to fit any type of bigger tire. I'm not sure about clearing 37's but my guess right off the top of my head would be no they will hit. You can always take the body lift out and try it. They are a piece of cake to install. If they hit you can trim the fenders if you want to do that kind of thing.

Chevy_mud_truck · 04-26-2016, 06:05 PM

Backspace and width of the wheel will make a big I run a set of 15x38.5x16.5 on a set of 16.5x9.75 wheels with just a 6" lift they only rubbed when it flexed

**JIMs70GMC** · 04-27-2016, 11:09 AM

I have 7" lift and run 37" goodyears on my K20, the PO did cut the fenders a little but i think they would still clear. The 37" military tires are closer to 36". I do have 1 ton axles, so I probably have a little more lift from the difference in the axles.

AntiGov · 04-27-2016, 11:49 PM

My one ton clears 37's pretty well, no cut fenders. It will rub a bit if flexed while turning but not often. 6 inch lift

teepaw · 04-28-2016, 12:41 AM

Quote:

Originally Posted by Chevy_mud_truck

Backspace and width of the wheel will make a big I run a set of 15x38.5x16.5 on a set of 16.5x9.75 wheels with just a 6" lift they only rubbed when it flexed

They are just 37x12.50 on 16.5x9.75 inch wheels. Sounds about like the same setup as yours. Is your truck a k20 or 1 ton?

04-25-2016, 11:53 AM	#1
teepaw Registered User Join Date: Apr 2016 Location: Knoxville, TN Posts: 2	Lift and tire question I recently bought a 79 gmc k20 longbed that has been lifted with a 6" suspension lift and a 3" body lift with 37" military tires. If i remove the body lift will my truck still clear the tires without much rubbing until i can afford to get new wheels and tires. It wont be used for offroading other than the minor things like just driving through fields for hunting. Thanks

04-26-2016, 10:40 AM	#2
liftlawssuck Registered User Join Date: Mar 2011 Location: MA Posts: 354	Re: Lift and tire question Can't believe no one chimed in here yet. I had the same lift as you but was running 38.5 Gumbos. After taking the body lift out the tires would hit when turned. These trucks need lift to fit any type of bigger tire. I'm not sure about clearing 37's but my guess right off the top of my head would be no they will hit. You can always take the body lift out and try it. They are a piece of cake to install. If they hit you can trim the fenders if you want to do that kind of thing.

04-26-2016, 06:05 PM	#3
Chevy_mud_truck Registered User Join Date: Feb 2015 Location: Lester West Virginia Posts: 244	Re: Lift and tire question Backspace and width of the wheel will make a big I run a set of 15x38.5x16.5 on a set of 16.5x9.75 wheels with just a 6" lift they only rubbed when it flexed

04-27-2016, 11:09 AM	#4
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Re: Lift and tire question I have 7" lift and run 37" goodyears on my K20, the PO did cut the fenders a little but i think they would still clear. The 37" military tires are closer to 36". I do have 1 ton axles, so I probably have a little more lift from the difference in the axles. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

04-27-2016, 11:49 PM	#5
AntiGov Registered User Join Date: Oct 2011 Location: central Oregon Posts: 1,220	Re: Lift and tire question My one ton clears 37's pretty well, no cut fenders. It will rub a bit if flexed while turning but not often. 6 inch lift __________________ 88 3+3 454 400 205 410 drw to srw still in pieces 90 3+3 350 400 205 410 srw 84 1/2 ton lb 6.2 4x4 parts truck



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