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73-87 Chevy _ GMC Trucks => Wheels & Tires => Topic started by: Choptop32 on July 27, 2008, 11:05:00 am

Title: 78 1/2 ton stock wheel size?
Post by: Choptop32 on July 27, 2008, 11:05:00 am

What is the width and backspace of a stock wheel on a 78 1/2 ton?

Title: Re: 78 1/2 ton stock wheel size?
Post by: Captkaos on July 27, 2008, 11:51:05 am

15x7 with 4" backspacing.

Title: Re: 78 1/2 ton stock wheel size?
Post by: bmaier on July 27, 2008, 01:07:57 pm

i always thought it was 15x8. and wasnt it different between 2 & 4 wheel drives?

Title: Re: 78 1/2 ton stock wheel size?
Post by: comp on July 27, 2008, 11:31:46 pm

steel wheels ??? rallys ??

Title: Re: 78 1/2 ton stock wheel size?
Post by: bmaier on July 27, 2008, 11:34:03 pm

i believe we are talkin bout the rallys...right?

Title: Re: 78 1/2 ton stock wheel size?
Post by: comp on July 27, 2008, 11:37:45 pm

Quote from: bmaier on July 27, 2008, 11:34:03 pm

i believe we are talkin bout the rallys...right?

 i'm don't know ???

Title: Re: 78 1/2 ton stock wheel size?
Post by: Choptop32 on July 27, 2008, 11:57:35 pm

yep, i'll post a pic of them on monday

Title: Re: 78 1/2 ton stock wheel size?
Post by: comp on July 28, 2008, 12:33:16 am

cool  ;D

Title: Re: 78 1/2 ton stock wheel size?
Post by: Captkaos on July 28, 2008, 09:54:38 am

Steel and Rally both were 15x7 with 4" backspacing.  There was an optional 15x8 Rally with 4" backspacing in the latter years also, but you asked about stock and I read that as standard.  The aluminum wheels were 15x7 with 4" backspacing also.  There were only 2 sizes offered by the factory, 15x7 and 15x8 both were 4" backspacing.  The rim size will be stamped on the wheel lip also...

Title: Re: 78 1/2 ton stock wheel size?
Post by: comp on July 28, 2008, 10:09:37 am

cool ,,,will look better

Title: Re: 78 1/2 ton stock wheel size?
Post by: Choptop32 on July 28, 2008, 11:36:37 am

(http://www.billetproof.com/images/alanpics/truckwheel.jpg)

here is the wheel. Its on my 64 Chevy Panel Truck. Was told by the previous owner that the wheels came off a 78 1/2 ton. I'm replacing them with Radir Tri-Ribs and wanted to get the same size, width and backspace, as space is a little tight on the rear end.

(http://www.billetproof.com/images/alanpics/64paneltruck.jpg)

Title: Re: 78 1/2 ton stock wheel size?
Post by: ccz145a on July 28, 2008, 01:09:07 pm

yep, they're 15x7. you can tell by the half moon cut out on the trim ring, 15x8 had a hole in a wider trim ring.

Title: Re: 78 1/2 ton stock wheel size?
Post by: Captkaos on July 28, 2008, 02:46:22 pm

you can also look on the back side.  the size is stamped on the rim.