Size of stock rallys on 77 blazer - The 1947 - Present Chevrolet & GMC Truck Message Board Network

9teen69 · 06-05-2003, 07:35 PM

Just bought a 77 blazer 4x4 - I have 3 of the rallys what size 15 by ? - need to buy one.

bigblock73 · 06-05-2003, 08:08 PM

Most people refer to them as 15X8 but they are actually 15X8.5

...Jeff

*1FaastC10* · 06-06-2003, 09:28 AM

could also be 15 x 7, my grandpa's '79 had 15 x 7s on it

**swervin ervin** · 06-06-2003, 11:06 AM

If you look on the wheel, close to the valve stem, it will have two or three letters, such as BK, CF, UA, or XAJ, DAB, DAC, etc. What are these letters?

bigblock73 · 06-06-2003, 11:16 AM

Quote:

Originally posted by 1FaastC10
could also be 15 x 7, my grandpa's '79 had 15 x 7s on it

Those aren't "Rally" wheels then. He probabaly had hub caps right?

ElGracho · 06-06-2003, 11:56 AM

Ummmm, actually, in 1977, stock GM argent 2wd truck rallies would be 15x7. They were available in both 15x7 and 15x8 in the 80's depending on the tire size you ordered with them. The rallies on my 75 Gentleman Jim are 15x7 while the ones from my 86 and 87 are both 15x8. The original rim size is printed on the sticker on the door post that includes tire pressures etc, this might be a place to look or tire shops have a caliper specifically made for measuring rim widths on steel wheels that you could use on one of your old rims. Another option is use the letter code that Mike is talking about, those give size and load range for the wheel.

**swervin ervin** · 06-06-2003, 12:29 PM

I've got 15 x 6.5's on my 87 van.

As a matter of fact, my 85 Helm's manual lists 15 x 6, 15 x 6.5, 15 x 7, and 15 x 8's.

Bill W · 06-06-2003, 01:52 PM

Since the question was about the size of the rally wheel on a 4x4 chevy blazer I would be a betting person that the only size was a 15x8, 6 lug wheel with chrome rings, chrome center caps with hole in the front caps to allow access to the locking hubs or just to look at the full time chrome caps if you had the full time option.

I'v got two sets. One on my 78 1/2 ton 4x4 pickup and another on my 91 4x4 Suburban.

Bill

ElGracho · 06-06-2003, 02:23 PM

Oh, brain fart. Yep, I totally missed the 4x4 part. They are 15x8's on a 4wd.

9teen69 · 06-06-2003, 04:56 PM

Thanks guys, that's what I needed - 15x8! The other stuff was also good to know.

06-05-2003, 07:35 PM	#1
9teen69 Registered User Join Date: Sep 2002 Location: Austin, Texas Posts: 1,048	Size of stock rallys on 77 blazer Just bought a 77 blazer 4x4 - I have 3 of the rallys what size 15 by ? - need to buy one. __________________ 72 Cheyenne SWB C10 (daily driver) (Super fake cause I just love the glovebox emblem) 70 Camaro RS (frame-off in pieces) 70 Camaro RS (daily driver backup) 69 Custom LWB C10 (son now drives)

06-06-2003, 11:06 AM	#4
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	If you look on the wheel, close to the valve stem, it will have two or three letters, such as BK, CF, UA, or XAJ, DAB, DAC, etc. What are these letters? __________________ Mike 1985 Chevy C-10

06-06-2003, 11:56 AM	#6
ElGracho Gentleman Jim Driver Join Date: Nov 2002 Location: Poulsbo, WA Posts: 1,553	Ummmm, actually, in 1977, stock GM argent 2wd truck rallies would be 15x7. They were available in both 15x7 and 15x8 in the 80's depending on the tire size you ordered with them. The rallies on my 75 Gentleman Jim are 15x7 while the ones from my 86 and 87 are both 15x8. The original rim size is printed on the sticker on the door post that includes tire pressures etc, this might be a place to look or tire shops have a caliper specifically made for measuring rim widths on steel wheels that you could use on one of your old rims. Another option is use the letter code that Mike is talking about, those give size and load range for the wheel. __________________ Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed

06-06-2003, 12:29 PM	#7
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	I've got 15 x 6.5's on my 87 van. As a matter of fact, my 85 Helm's manual lists 15 x 6, 15 x 6.5, 15 x 7, and 15 x 8's. __________________ Mike 1985 Chevy C-10 Last edited by swervin ervin; 06-06-2003 at 12:34 PM.

06-06-2003, 02:23 PM	#9
ElGracho Gentleman Jim Driver Join Date: Nov 2002 Location: Poulsbo, WA Posts: 1,553	Oh, brain fart. Yep, I totally missed the 4x4 part. They are 15x8's on a 4wd. __________________ Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed

06-05-2003, 08:08 PM	#2
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	Most people refer to them as 15X8 but they are actually 15X8.5 ...Jeff

06-06-2003, 09:28 AM	#3
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	could also be 15 x 7, my grandpa's '79 had 15 x 7s on it

06-06-2003, 01:52 PM	#8
Bill W Registered User Join Date: Mar 2003 Location: Oregon Posts: 229	Since the question was about the size of the rally wheel on a 4x4 chevy blazer I would be a betting person that the only size was a 15x8, 6 lug wheel with chrome rings, chrome center caps with hole in the front caps to allow access to the locking hubs or just to look at the full time chrome caps if you had the full time option. I'v got two sets. One on my 78 1/2 ton 4x4 pickup and another on my 91 4x4 Suburban. Bill

06-06-2003, 04:56 PM	#10
9teen69 Registered User Join Date: Sep 2002 Location: Austin, Texas Posts: 1,048	Thanks guys, that's what I needed - 15x8! The other stuff was also good to know. __________________ 72 Cheyenne SWB C10 (daily driver) (Super fake cause I just love the glovebox emblem) 70 Camaro RS (frame-off in pieces) 70 Camaro RS (daily driver backup) 69 Custom LWB C10 (son now drives)

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