Stock tires
 

anyone know stock tire size for a 86 c10 .... rlms are 15 x 7 ?

Re: Stock tires
 

Tire rack says 225 or 235 75 15’s.

https://www.tirerack.com/tires/Selec...6&autoModClar=

Re: Stock tires
 

Cool thanks

Re: Stock tires
 

I don't know exactly what came on them in 1986, but it seems like my 1980 K/10 had something like H78-15. :lol:

So those tire rack options could be replacement tire sizes.

I had P225/70R15 on my Jeep and when I ruined one this year they couldn't get a replacement. So they "gave" me four LT235/75R15 under warranty, but I had to pay for a new spare along with mounting and new warranty. Nice upgrade except they rub on the lower control arms on a tight turn.

Re: Stock tires
 

I ordered 2 235/75R15 tires now I need 4 15x8 rims. I could only find a 15x7 at the junk yard for 85 bucks and it was White. No one has inexpensive wheel on line.

Re: Stock tires
 

You don’t need 8 inch rims for 235 tires.
I assume that’s what you’re thinking.

Re: Stock tires
 

I removed the spare that's been under my 85 silverado for 30 years and the rim was 8" and it looks like the stock rim, But the rim was rusted too bad from water getting inside because it was Flat for years I guess.
Is there a Off Set for square body trucks?

Re: Stock tires
 

The stock 15x7’s on my 84 were 4 inch backspacing. No offset.
15x8’s are usually same backspace but would have an offset of 1 inch.

I used some newer ss454 rims on my 84. They were 15x7 with 4 inch bs.

Re: Stock tires
 

My 86 came with 15x7 with 225/75 x15, bought it brand new in 86

Re: Stock tires
 

15 X 6 on my 87 R10

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I talked to the original owned he said the spare is one of the original wheels They sure look alot bigger than the 7" rim.

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15x8's where around as well.

Re: Stock tires
 

Re: Stock tires
 

Most with factory steel wheels, which I think were 6 or 6.5 inch wide came with FR78 for the size. Depending on who's scale you look at, it is normally a 205/78x15 for the size. Most folks run the 225 or 235 in 75 series which is just a hair taller, which is about the size when they used the 8" wide rally wheels.( GR78 I believe for back then)

Re: Stock tires
 

The spare is a rally wheel . I bought a set from Specialk for my burban ,sold the burban same day I picked up the rims . Staggered set 15x7 and 15x8 most likely going on my 68 when I convert to disc and 5 lug

Re: Stock tires
 

Found a photo from when I bought the truck. Wish I still had the wheels.

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A break downhttps://tireguides.com/TireTips/TireDocument/4

Re: Stock tires
 

My '86 suburban came with factory 8" rally's and P235/75R15XL tires. I assume that XL back in the day is the predecessor to LT tires today.

SPID attached showing the option.

Re: Stock tires
 

The 86 I just bought shows a P195/75R15 as the stock tire size on the SPID. Pretty sure the stock rims for these where 15"x5.5" with a 10.125" hub cap. Those are missing now from the truck. But I have a full set I can put on if I decide to go that way.

The truck has either 225 or 235 75R15's on it now with '88 up style truck rally wheels also missing the center caps and trim rings..

Re: Stock tires
 

P means passenger. I dunno what XL means but there were light truck tires long long before there was a P or LT designation, and before radial tires.

We were running 7.00-15 6 ply truck tires on our half ton way back in the 1960s (after the piss poor passenger tires that it came with blew out).

Re: Stock tires
 

Do you know what size the '88 and up wheels are.. 7 or 8?

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GM did not make 8" wide wheel after 87....widest 15 are the 7" alloys. Steels I believe were all 6.5 (on the 1500 models)

Re: Stock tires
 

i have only seen 7" or 8" wide on the trucks my self up here in the north east . i have prob 2 full sets of decent 15x8" GM rims .

i just started doing up rims for my c-10 short bed build . i did 2 6.5" from a G-series van for the front with 235/70/15 and 255/70/15 rear on 8" wide and it gives it a nice staggered look .

here is the look i have going and last pic of the center cap and lug cover combo i picked .

and fyi my whole truck is down 2.5" from stock height . just to give you a size reference .

Re: Stock tires
 

And I thought people that ran a P215/75-15 were using too light a tire for a truck but a P195! Wow! Most trucks in the 70 / 80’s using the passenger tire were P235 /78 on an 8” rally wheel. Must of been the area I lived. Now I am finding 7” rally wheels all over with very few 8”. Occasionally I find an 8” in pick n pull.

Re: Stock tires
 

I always ran 235/75R15's on the 1/2 tons and 265/75R16 on the 3/4 tons.
Most of my 1/2 tons came with 215/75R15's and 245/75R16's on the 3/4 tons.

IIRC I ran 235's on my 1968 IH Scout 800 back in the 80's with no issues.