stock tires? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

linkster · 03-09-2003, 02:08 AM

I have purchased a 1975 GMC Sierra 3/4 ton pickup with 225x75R16 tires on it. Are these stock tires? If not, what would be the stock tire size?

79BIG10 · 03-09-2003, 03:40 AM

Welcome to the board

Yes it sounds like those are stock tires. My truck has 225-75-15 on it when I bought it from the original owner. I'm thinking that he kept the same size tires the whole time.

RockHQ · 03-09-2003, 05:09 AM

I recall all chevy 8-lug stock wheels being 16.5 in diameter.

79GMC454C35 · 03-09-2003, 11:14 AM

Check in your glove box. My 79 1Ton has a list of equipment & Options on a sticker in the glove box. Tire size is listed there also. Hope this helps.

gmcbob · 03-09-2003, 01:53 PM

I looked in my '75 gmc sales brochure thinking I could get you some info on the options. Odd, there was nothing in there on tire sizes for the different models.

gmcbob · 03-09-2003, 01:55 PM

In '76, the sales brochure lists the options for a 3/4 ton as 8.75-16C and 9.50-16.5D.

Hope this helps

linkster · 03-09-2003, 07:05 PM

Thanks guys. This should help me.

03-09-2003, 02:08 AM	#1
linkster Registered User Join Date: Mar 2003 Location: Leavenworth, WA Posts: 3	stock tires? I have purchased a 1975 GMC Sierra 3/4 ton pickup with 225x75R16 tires on it. Are these stock tires? If not, what would be the stock tire size?

03-09-2003, 03:40 AM	#2
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,775	Welcome to the board Yes it sounds like those are stock tires. My truck has 225-75-15 on it when I bought it from the original owner. I'm thinking that he kept the same size tires the whole time. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

03-09-2003, 05:09 AM	#3
RockHQ ROCKET POWER! Join Date: Feb 2003 Location: Finland, Europe Posts: 509	I recall all chevy 8-lug stock wheels being 16.5 in diameter. __________________ What did i do last nite? I had a wonderful time, That's what they tell me What did i do last nite? 1979 C-10 shortfleet: Olds 350, Th400, 12 bolt Current project: 1969 Olds 455 W-30, needing a rebuild

03-09-2003, 11:14 AM	#4
79GMC454C35 Registered User Join Date: Mar 2003 Location: Arizona Posts: 115	Re: Tire Size Check in your glove box. My 79 1Ton has a list of equipment & Options on a sticker in the glove box. Tire size is listed there also. Hope this helps.

03-09-2003, 01:53 PM	#5
gmcbob Registered User Join Date: Mar 2000 Location: Phoenix, Arizona Posts: 57	I looked in my '75 gmc sales brochure thinking I could get you some info on the options. Odd, there was nothing in there on tire sizes for the different models. __________________ Bob 1978 GMC Sierra Classic K15 Shortbed, 350/350/NP203, 31's on Rally's, Restored to Stock Condition. Two-tone Russett Metallic / Buckskin. 1987 GMC Sierra Classic V1500, Longbed, 350 TBI, NP205, 33’s on Chrome Spoke with 4” Suspension Lift. Black. 2014 GMC 2500HD 4x4 Duramax Crewcab

03-09-2003, 01:55 PM	#6
gmcbob Registered User Join Date: Mar 2000 Location: Phoenix, Arizona Posts: 57	In '76, the sales brochure lists the options for a 3/4 ton as 8.75-16C and 9.50-16.5D. Hope this helps __________________ Bob 1978 GMC Sierra Classic K15 Shortbed, 350/350/NP203, 31's on Rally's, Restored to Stock Condition. Two-tone Russett Metallic / Buckskin. 1987 GMC Sierra Classic V1500, Longbed, 350 TBI, NP205, 33’s on Chrome Spoke with 4” Suspension Lift. Black. 2014 GMC 2500HD 4x4 Duramax Crewcab

03-09-2003, 07:05 PM	#7
linkster Registered User Join Date: Mar 2003 Location: Leavenworth, WA Posts: 3	Thanks guys. This should help me.



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