What Was Largest Stock Tire Option On 72 K5? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DANL · 01-12-2007, 09:42 PM

Hey Members, I am considering buying stock 16" wheels for my 72 K5. I want to determine if 16" wheels came stock from GM on the 72 K5 and if so what largest stock tire option was offered. I need this info for the following two reasons:

1. I want to install the tallest tire option GM originally offered but do not want to worry about rubbing.
2. COSTCO will not warranty tires if I can not provide GM data stating this size tire was an original stock option.

Any help would be appreciated.

Thanks in advance.

...Dan

cdowns · 01-12-2007, 10:09 PM

H78-15

jacobs · 01-12-2007, 10:49 PM

Don't know about 1972 but I have an original "1970 Chevrolet Movers - Blazer" sales brochure that shows the following optional tire sizes.....
Tubless: G78-15-B, H78-15-B, 8.75-16.5, 10.00-16.5
Tube-Type: G78-15-B, 6.50-16, 7.00-15

bouncytruck · 01-12-2007, 11:02 PM

My '72 has stock 16" rims with 235/85R16. I assume they are the stock tire size.

jacobs · 01-12-2007, 11:17 PM

I just located a "1972 Chevrolet Trucks/Pickups, Chassis Cabs & 4-Wheel Drives" brochure. Optional tire sizes for 1/2 ton 4 wheel drive:

Tubless Tires: H78-15B, 10.00-16.5C
Tube-Type: G78-15B, 6.50-16C, 7.00-15C

skchevota · 01-12-2007, 11:38 PM

Back in 72 they did not use metric sizing as they do today. If costco is going to be that strict then they proboly wont except an equivalent of the original ither. If it were me I would tell costco to go suck an egg and go to a repitable tire sror that warrantys there product and does not try to hide behind loop holes. Try Discount tire or 4 wheel parts wholesalers, and pick a size that you like. If you want to stay with a stock look but have a modern size go with a 265/75/16, its a very common modern pickup/ suburban tire you can find any where for cheap. Try wallmart as well.

DANL · 01-13-2007, 12:05 AM

Hey Guys, thanks for the input.

Jacobs, I have a 72 K5 brochure that list tube type
6.50-16C with rim width 5.0-8.25. Does this indicate
a 6.5” sidewall height on a 16” rim which would be
225/75r16 with 29.3” dia?

Bouncy, appears your tires have 31.7” dia? Did you add
the lift to your K5?

…Dan

Longhorn Man · 01-13-2007, 05:31 AM

it's funny... i thought Sams was the only ones that did that sh!t. They REFUSED to put on the tires i picked out for my baby sister's VW, when they installed the ones there computer said was right... THEY RUBBED! Morons.

01-12-2007, 09:42 PM	#1
DANL Senior Member Join Date: Mar 2002 Location: Bartlett, TN Posts: 348	What Was Largest Stock Tire Option On 72 K5? Hey Members, I am considering buying stock 16" wheels for my 72 K5. I want to determine if 16" wheels came stock from GM on the 72 K5 and if so what largest stock tire option was offered. I need this info for the following two reasons: 1. I want to install the tallest tire option GM originally offered but do not want to worry about rubbing. 2. COSTCO will not warranty tires if I can not provide GM data stating this size tire was an original stock option. Any help would be appreciated. Thanks in advance. ...Dan

01-12-2007, 10:09 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: What Was Largest Stock Tire Option On 72 K5? H78-15 __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

01-12-2007, 10:49 PM	#3
jacobs Registered User Join Date: Sep 2005 Location: 9000' Mountain Man Posts: 326	Re: What Was Largest Stock Tire Option On 72 K5? Don't know about 1972 but I have an original "1970 Chevrolet Movers - Blazer" sales brochure that shows the following optional tire sizes..... Tubless: G78-15-B, H78-15-B, 8.75-16.5, 10.00-16.5 Tube-Type: G78-15-B, 6.50-16, 7.00-15

01-12-2007, 11:02 PM	#4
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,049	Re: What Was Largest Stock Tire Option On 72 K5? My '72 has stock 16" rims with 235/85R16. I assume they are the stock tire size. __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

01-12-2007, 11:17 PM	#5
jacobs Registered User Join Date: Sep 2005 Location: 9000' Mountain Man Posts: 326	Re: What Was Largest Stock Tire Option On 72 K5? I just located a "1972 Chevrolet Trucks/Pickups, Chassis Cabs & 4-Wheel Drives" brochure. Optional tire sizes for 1/2 ton 4 wheel drive: Tubless Tires: H78-15B, 10.00-16.5C Tube-Type: G78-15B, 6.50-16C, 7.00-15C Last edited by jacobs; 01-12-2007 at 11:18 PM.

01-12-2007, 11:38 PM	#6
skchevota Registered User Join Date: Oct 2006 Location: Evans, Colorado Posts: 530	Re: What Was Largest Stock Tire Option On 72 K5? Back in 72 they did not use metric sizing as they do today. If costco is going to be that strict then they proboly wont except an equivalent of the original ither. If it were me I would tell costco to go suck an egg and go to a repitable tire sror that warrantys there product and does not try to hide behind loop holes. Try Discount tire or 4 wheel parts wholesalers, and pick a size that you like. If you want to stay with a stock look but have a modern size go with a 265/75/16, its a very common modern pickup/ suburban tire you can find any where for cheap. Try wallmart as well.

01-13-2007, 12:05 AM	#7
DANL Senior Member Join Date: Mar 2002 Location: Bartlett, TN Posts: 348	Re: What Was Largest Stock Tire Option On 72 K5? Hey Guys, thanks for the input. Jacobs, I have a 72 K5 brochure that list tube type 6.50-16C with rim width 5.0-8.25. Does this indicate a 6.5” sidewall height on a 16” rim which would be 225/75r16 with 29.3” dia? Bouncy, appears your tires have 31.7” dia? Did you add the lift to your K5? …Dan

01-13-2007, 05:31 AM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: What Was Largest Stock Tire Option On 72 K5? it's funny... i thought Sams was the only ones that did that sh!t. They REFUSED to put on the tires i picked out for my baby sister's VW, when they installed the ones there computer said was right... THEY RUBBED! Morons.

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