33's on an 86 k10 with stock suspension? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

WDE86 · 06-21-2013, 10:22 AM

Is this possible? If not what's the best way to go about lifting it up just enough for the 33" tires? I really love the look of these trucks when the wheel wells are filled up.

**special-K** · 06-21-2013, 09:39 PM

I ran 12.50/33-15s on my '90 Blazer mounted on 10" wheels. I was concerned about front clearance,only because of the 10" wheels,so I went to the spring shop and asked them to level it up...lift front 1-2" and add a leaf. Worked great. I think with 8" wheels the tires work fine. If you do lift,just go with 2". It won't exactly looked lifted,just "healthy". You can also go with 10.50/33-15s or 285/75-16s (if you're buying wheels)

thirdstreettito · 06-27-2013, 07:26 AM

You can should be able to run 33x9.50 and 33x10.50 without rubbing. You can run 33x12.50 if you trim an inch off the rear inside of the front fender.

72MARIO · 07-01-2013, 08:04 AM

I have 285 75 16 on my 1990 2500 suburban. they rub the back bottom of the fenders...I think the springs have sagged a bit.

Psycho71 · 07-10-2013, 03:12 PM

Shouldn't be much of an issue, but there are a few things to look for/pay attention to.

Sagging stock springs.
Collapsed body mount bushings.

And finally, perhaps most importantly, watching the backspace on the wheels you plan to run.

My K20 burb has a 4' lift, and I can run 36" tires on 10" rims with 6" of backspace, and they don't rub unless I flex the suspension pretty good. I have another set of 10" wide wheels with 2" of backspace, and the 35's on them rub easily when turning.

Easiest way to lift is a set of blocks on the rear, or a shackle flip kit (4" gain), and a set of springs in the front. Kits can be had for pretty cheap, and usually installed in a days time.

SnowNeck · 07-14-2013, 04:45 PM

i have a 85 high sierra stepside, 33/12.5/15, gone off roading, flexed it out. turn as sharp as i want never touched, Also i'd like to add, my leafs are at the end of their life.

tgh117 · 07-22-2013, 09:35 AM

I to have ran my 77 stepper with 33's. The only time I ever had an issue was when my plow was on the front, I could catch the rear corner of the fender when on the brakes.

I actually like the look better then with my 4" and 35's that I have now.

3672300 · 04-20-2015, 03:48 PM

Quote:

Originally Posted by thirdstreettito

You can should be able to run 33x9.50 and 33x10.50 without rubbing. You can run 33x12.50 if you trim an inch off the rear inside of the front fender.

If I dont go off road and have just a show truck, will I still need to do this fender mod with 33x12.50s?

**JIMs70GMC** · 04-21-2015, 08:35 AM

My 86 with 33 12.5r15's on stock rally wheels. I have add-a-leafs front and rear.

3672300 · 06-17-2015, 06:13 AM

So 33x12.50s will fit ok on 8" rally wheel?
Posted via Mobile Device

**special-K** · 06-17-2015, 06:49 AM

Quote:

Originally Posted by SnowNeck

i have a 85 high sierra stepside, 33/12.5/15, gone off roading, flexed it out. turn as sharp as i want never touched, Also i'd like to add, my leafs are at the end of their life.

If this is in the red truck shown in the avatar, that truck is lifted. Looks like 4" from here...if those are 33/12.50s on it.

Here is the '90 Blazer that I had the spring shop level by bringing the front end up 1-2". The tries would rub behind the front tires when turning while twisting. It would probably not have rubs with 8" wheels
http://i190.photobucket.com/albums/z...s/DSC00502.jpg

**JIMs70GMC** · 06-17-2015, 08:58 PM

Quote:

Originally Posted by 3672300

So 33x12.50s will fit ok on 8" rally wheel?
Posted via Mobile Device

Yep.

06-21-2013, 10:22 AM	#1
WDE86 Registered User Join Date: Jan 2013 Location: Alabama Posts: 37	33's on an 86 k10 with stock suspension? Is this possible? If not what's the best way to go about lifting it up just enough for the 33" tires? I really love the look of these trucks when the wheel wells are filled up.

06-21-2013, 09:39 PM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: 33's on an 86 k10 with stock suspension? I ran 12.50/33-15s on my '90 Blazer mounted on 10" wheels. I was concerned about front clearance,only because of the 10" wheels,so I went to the spring shop and asked them to level it up...lift front 1-2" and add a leaf. Worked great. I think with 8" wheels the tires work fine. If you do lift,just go with 2". It won't exactly looked lifted,just "healthy". You can also go with 10.50/33-15s or 285/75-16s (if you're buying wheels) __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

06-27-2013, 07:26 AM	#3
thirdstreettito Resident of Here Join Date: May 2008 Location: Wesley Chapel, FL, USA Posts: 7,716	Re: 33's on an 86 k10 with stock suspension? You can should be able to run 33x9.50 and 33x10.50 without rubbing. You can run 33x12.50 if you trim an inch off the rear inside of the front fender. __________________ ~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck

07-01-2013, 08:04 AM	#4
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,052	Re: 33's on an 86 k10 with stock suspension? I have 285 75 16 on my 1990 2500 suburban. they rub the back bottom of the fenders...I think the springs have sagged a bit. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

07-10-2013, 03:12 PM	#5
Psycho71 Registered User Join Date: Jan 2006 Location: Kaufman, Tx Posts: 827	Re: 33's on an 86 k10 with stock suspension? Shouldn't be much of an issue, but there are a few things to look for/pay attention to. Sagging stock springs. Collapsed body mount bushings. And finally, perhaps most importantly, watching the backspace on the wheels you plan to run. My K20 burb has a 4' lift, and I can run 36" tires on 10" rims with 6" of backspace, and they don't rub unless I flex the suspension pretty good. I have another set of 10" wide wheels with 2" of backspace, and the 35's on them rub easily when turning. Easiest way to lift is a set of blocks on the rear, or a shackle flip kit (4" gain), and a set of springs in the front. Kits can be had for pretty cheap, and usually installed in a days time. __________________ You only need two tools in life - WD-40 and Duct Tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape. If a hammer doesn't fix it, you have an electrical problem! Slot Cars, 1:24 Scale, 100MPH@100,000RPM, fastest things on wheels!

07-14-2013, 04:45 PM	#6
SnowNeck Registered User Join Date: May 2012 Location: Pennsylvania Posts: 132	Re: 33's on an 86 k10 with stock suspension? i have a 85 high sierra stepside, 33/12.5/15, gone off roading, flexed it out. turn as sharp as i want never touched, Also i'd like to add, my leafs are at the end of their life. __________________ 1985 High Sierra step side 4x4

07-22-2013, 09:35 AM	#7
tgh117 Crazy Join Date: Apr 2005 Location: Emmaus, Pa Posts: 203	Re: 33's on an 86 k10 with stock suspension? I to have ran my 77 stepper with 33's. The only time I ever had an issue was when my plow was on the front, I could catch the rear corner of the fender when on the brakes. I actually like the look better then with my 4" and 35's that I have now. __________________ 77 SB Stepside in a bunch of pieces scattered around the garage.

04-21-2015, 08:35 AM	#9
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Re: 33's on an 86 k10 with stock suspension? My 86 with 33 12.5r15's on stock rally wheels. I have add-a-leafs front and rear. Attached Images __________________ 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

06-17-2015, 06:13 AM	#10
3672300 Registered User Join Date: Dec 2014 Location: Kosse, Tx Posts: 69	Re: 33's on an 86 k10 with stock suspension? So 33x12.50s will fit ok on 8" rally wheel? Posted via Mobile Device



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