Will 33x12.5x16.5 tires fit a stock 1972 C20 4x4? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72c204x4 · 02-27-2007, 09:42 PM

I'm looking at a set of used 33x12.5x16.5 mud tires for my old 1972 C20 4x4 farm truck. After searching the posts I'm somewhat surprised to not find anyone else having posted this question before.

The truck gets very little use, but I'd rather not have tires rubbing all over my hunny.

Thanks for the help!!

JAKES 68GMC · 02-27-2007, 09:46 PM

They should fit just fine with stock springs. 2" lift is better though. My truck has dearched springs with 33" tall 7.00x17 tires, and they clear just fine, no rubbing.

msgross · 02-27-2007, 09:49 PM

depends on the backspacing of the rims. The width of those tires might cause a little rubbing. Since it's a 3/4 ton then you might be ok though. I don't think that you would be able to do any hard wheeling though without a little rub. Add some add-a-leafs or short lift and you would be better. I went with 10.5 width and they are ok but that's on a k10

69TowRig · 02-27-2007, 11:03 PM

I have some 32x11.50 MTRs on my truck with 15x8 wheels of an unknown offset. I found that with my manual steering box the tires would rub just a bit, I swapped to a power box and everything is close but peachy. Your tires will be a tiny tad wider, not sure if that is going to make the difference or not.

**special-K** · 02-28-2007, 08:09 AM

I have that size on a `72 K/2500 GMC mounted on 8.25" rims,they don`t rub.The springs are original and settled with a pronounced negative arch.I had the same tires on 9.75" rims and they rubbed a bit,no damage.That`s with general running around,no 4wheelin`.Here`s a picture with the wider rims:

va_tlc · 02-28-2007, 08:20 AM

hmmm i have 32x11.5 on 9.75 wheels and mine rub if you bind it up and its a 3/4 ton. im wondering if my springs are worn out . it will be fine as long as ya dont 4wd it harshly.

**special-K** · 02-28-2007, 08:43 AM

It`s the offset of the wheels.Narrower wheels make all the difference in the world.

msgross · 02-28-2007, 09:07 AM

I have 8" rims on my 10.5's.. no rubby

**Stocker** · 10-28-2018, 11:33 PM

Sorry Mods, I reported the post before realizing the account was already suspended. You are quick tonight!

**special-K** · 10-29-2018, 08:26 AM

I just got on. Probably posted these in several forums. Thanks for reporting, always a good thing.

02-27-2007, 09:42 PM	#1
72c204x4 Registered User Join Date: Sep 2004 Location: NC Posts: 3	Will 33x12.5x16.5 tires fit a stock 1972 C20 4x4? I'm looking at a set of used 33x12.5x16.5 mud tires for my old 1972 C20 4x4 farm truck. After searching the posts I'm somewhat surprised to not find anyone else having posted this question before. The truck gets very little use, but I'd rather not have tires rubbing all over my hunny. Thanks for the help!! Last edited by 72c204x4; 02-27-2007 at 09:43 PM.

02-27-2007, 09:46 PM	#2
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,212	Re: Will 33x12.5x16.5 tires fit a stock 1972 C20 4x4? They should fit just fine with stock springs. 2" lift is better though. My truck has dearched springs with 33" tall 7.00x17 tires, and they clear just fine, no rubbing.

02-27-2007, 09:49 PM	#3
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: Will 33x12.5x16.5 tires fit a stock 1972 C20 4x4? depends on the backspacing of the rims. The width of those tires might cause a little rubbing. Since it's a 3/4 ton then you might be ok though. I don't think that you would be able to do any hard wheeling though without a little rub. Add some add-a-leafs or short lift and you would be better. I went with 10.5 width and they are ok but that's on a k10 __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

02-27-2007, 11:03 PM	#4
69TowRig Senior Member Join Date: Jan 2005 Location: Raleigh, NC Posts: 894	Re: Will 33x12.5x16.5 tires fit a stock 1972 C20 4x4? I have some 32x11.50 MTRs on my truck with 15x8 wheels of an unknown offset. I found that with my manual steering box the tires would rub just a bit, I swapped to a power box and everything is close but peachy. Your tires will be a tiny tad wider, not sure if that is going to make the difference or not. __________________ -Chris Building a stripper, one part at a time: 1969 K5, 307, 3spd, 3 seats, hard top. Added Pwr Discs, Pwr Steering, Aux Battery, T-case Skid, Lighted Sidemarkers, HEI, Lock-Right Diff, ECE Class IV Hitch, 32" MT/Rs. Parts to Install: Hand Throttle, Console, Tow Hooks, Dual Horns, AM-FM, Dealer Swing-Away Tire Carrier, Gas Tank Skid. Also building a 1950 Willys CJ-3A and off-roading a 2001 Nissan Frontier on 1-Ton Portals...

02-28-2007, 08:09 AM	#5
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: Will 33x12.5x16.5 tires fit a stock 1972 C20 4x4? I have that size on a `72 K/2500 GMC mounted on 8.25" rims,they don`t rub.The springs are original and settled with a pronounced negative arch.I had the same tires on 9.75" rims and they rubbed a bit,no damage.That`s with general running around,no 4wheelin`.Here`s a picture with the wider rims: Attached Images __________________ "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 ~ Last edited by special-K; 10-29-2018 at 08:27 AM. Reason: Chance to ditch Pbucket icon, add picture back in. Thanks scammer!

02-28-2007, 08:20 AM	#6
va_tlc Registered User Join Date: Nov 2005 Location: VIRGINIA Posts: 905	Re: Will 33x12.5x16.5 tires fit a stock 1972 C20 4x4? hmmm i have 32x11.5 on 9.75 wheels and mine rub if you bind it up and its a 3/4 ton. im wondering if my springs are worn out . it will be fine as long as ya dont 4wd it harshly. __________________ 1969 rs 1966fastback 1969swbc/10 2006gt 1972swb4x4

02-28-2007, 08:43 AM	#7
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: Will 33x12.5x16.5 tires fit a stock 1972 C20 4x4? It`s the offset of the wheels.Narrower wheels make all the difference in the world. __________________ "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 ~

02-28-2007, 09:07 AM	#8
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: Will 33x12.5x16.5 tires fit a stock 1972 C20 4x4? I have 8" rims on my 10.5's.. no rubby __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

10-28-2018, 11:33 PM	#9
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,533	Re: Will 33x12.5x16.5 tires fit a stock 1972 C20 4x4? Sorry Mods, I reported the post before realizing the account was already suspended. You are quick tonight! __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

10-29-2018, 08:26 AM	#10
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: Will 33x12.5x16.5 tires fit a stock 1972 C20 4x4? I just got on. Probably posted these in several forums. Thanks for reporting, always a good thing. __________________ "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 ~



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