Help on Rally wheel size? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Wantavant · 02-06-2018, 10:15 AM

I just picked up an 86 C-10 rcsb and was wondering if the wheels are 15x7 or 15x8? Are there any special markings I can look for, the tire size that came on the truck are 235/70 15......thanks

Jaysonb · 02-06-2018, 10:16 AM

Truck rallys are 8".

Wantavant · 02-06-2018, 10:19 AM

Quote:

Originally Posted by Jaysonb

Truck rallys are 8".

oh, well thats perfect! Thank you for the help!

SCOTI · 02-06-2018, 10:39 AM

It's a used 1986 truck. Just because it might of came w/8" truck ralleys doesn't mean it still has them. People are known to change things around. Post up a pic of the wheels to get a definitive answer.

There are also the less common 7" ralleys as well as 6.5's from vans. Then there are aftermarket sizes too....

**Palf70Step** · 02-06-2018, 10:51 AM

My daughters's 82 came with 7" ralleys from the factory. As mentioned, trucks could be 7 or 8 inch wide, depending on how it was ordered. Van's had the 6.5" ralleys. This is all for the 5 lug ralleys. Far as I know the 4wd (6 lug) ralleys only came in 8 inch wide. As mentioned aftermarket lets you get a few more widths and diameters that what came from the factory. From what I have seen, the non-silverado models tended to have the 7" ralleys. That's just my experience. AS mentioned, who the heck knows if those are original to the truck or not.

Wantavant · 02-06-2018, 11:00 AM

Here's a few pics, can you tell from these what size they are? Don't mind the ugly bed cover....lol

https://www.flickr.com/photos/159340...posted-public/
https://www.flickr.com/photos/159340...posted-public/
https://www.flickr.com/photos/159340...posted-public/

**Palf70Step** · 02-06-2018, 11:04 AM

I would say those are 8" from the depth of the trim ring.

This is what the 7" ones looked like.

Wantavant · 02-06-2018, 11:10 AM

Ok thank you guys! Gonna be dropping the truck soon and wanted to make sure I could fit a 275/60 tire on the rear.

SCOTI · 02-06-2018, 12:33 PM

To be sure, you can always take a wheel off & measure. Measure from the mounting pad to the back edge & then again to the front edge. Add the dimensions together & subtract 1" (~.500" for each bead).

Wantavant · 02-06-2018, 12:36 PM

I was looking all over the wheels last night, i did see an 8 stamped on the outside by the valve stem but not sure if that has anything to do with it.

02-06-2018, 10:15 AM	#1
Wantavant Registered User Join Date: Feb 2016 Location: Sioux city, Iowa Posts: 53	Help on Rally wheel size? I just picked up an 86 C-10 rcsb and was wondering if the wheels are 15x7 or 15x8? Are there any special markings I can look for, the tire size that came on the truck are 235/70 15......thanks

02-06-2018, 10:16 AM	#2
Jaysonb Registered User Join Date: May 2009 Location: Good Thunder Mn. Posts: 955	Re: Help on Rally wheel size? Truck rallys are 8". __________________ 77 k10 winter beater build http://67-72chevytrucks.com/vboard/s...d.php?t=716884 85 GMC short fleet budget build http://67-72chevytrucks.com/vboard/s...d.php?t=714222 80 C10 stepside build http://67-72chevytrucks.com/vboard/s...d.php?t=693848

02-06-2018, 10:39 AM	#4
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,064	Re: Help on Rally wheel size? It's a used 1986 truck. Just because it might of came w/8" truck ralleys doesn't mean it still has them. People are known to change things around. Post up a pic of the wheels to get a definitive answer. There are also the less common 7" ralleys as well as 6.5's from vans. Then there are aftermarket sizes too.... __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

02-06-2018, 10:51 AM	#5
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,216	Re: Help on Rally wheel size? My daughters's 82 came with 7" ralleys from the factory. As mentioned, trucks could be 7 or 8 inch wide, depending on how it was ordered. Van's had the 6.5" ralleys. This is all for the 5 lug ralleys. Far as I know the 4wd (6 lug) ralleys only came in 8 inch wide. As mentioned aftermarket lets you get a few more widths and diameters that what came from the factory. From what I have seen, the non-silverado models tended to have the 7" ralleys. That's just my experience. AS mentioned, who the heck knows if those are original to the truck or not. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

02-06-2018, 11:00 AM	#6
Wantavant Registered User Join Date: Feb 2016 Location: Sioux city, Iowa Posts: 53	Re: Help on Rally wheel size? Here's a few pics, can you tell from these what size they are? Don't mind the ugly bed cover....lol https://www.flickr.com/photos/159340...posted-public/ https://www.flickr.com/photos/159340...posted-public/ https://www.flickr.com/photos/159340...posted-public/

02-06-2018, 11:04 AM	#7
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,216	Re: Help on Rally wheel size? I would say those are 8" from the depth of the trim ring. This is what the 7" ones looked like. Attached Images __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! Last edited by Palf70Step; 02-06-2018 at 11:09 AM.

02-06-2018, 11:10 AM	#8
Wantavant Registered User Join Date: Feb 2016 Location: Sioux city, Iowa Posts: 53	Re: Help on Rally wheel size? Ok thank you guys! Gonna be dropping the truck soon and wanted to make sure I could fit a 275/60 tire on the rear.

02-06-2018, 12:33 PM	#9
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,064	Re: Help on Rally wheel size? To be sure, you can always take a wheel off & measure. Measure from the mounting pad to the back edge & then again to the front edge. Add the dimensions together & subtract 1" (~.500" for each bead). __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

02-06-2018, 12:36 PM	#10
Wantavant Registered User Join Date: Feb 2016 Location: Sioux city, Iowa Posts: 53	Re: Help on Rally wheel size? I was looking all over the wheels last night, i did see an 8 stamped on the outside by the valve stem but not sure if that has anything to do with it.

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