Terms for Rims - Pontiac GTO Forum
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post #1 of 14 (permalink) Old 03-19-2008, 11:28 AM Thread Starter
 
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Terms for Rims

I know this may be a naive question, but when looking for rally IIs, I noticed codes like JA, etc. What does this mean? Also, if my car came with 14x70, what size should I use? I'd like to go to 15s but what about the width? Any suggestions? I don't want a hot rod or anything, but what is a standard width?

Linda
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post #2 of 14 (permalink) Old 03-19-2008, 12:18 PM
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Hi Linda. In '67, the width was 6 inches. They were 14 inchers. Later on, the widths for the 14" rims went to 7 inches. That's what I'm running. Ralley II's off of a '71 firebird. I paid $20 each at a wrecking yard for the bare rims. Ralley II's came all the way up to 15" diameter and an 8" width. You can find a decent set of 15x7 or 15x8 Ralley II's off of many early-mid 70's Pontiacs. You can get the correct center caps, lug nuts, and trim rings from the vendors. I'm running 225/70/14 tires on my '67 and I like the look. To do it again, I'd probably score some 15X7's and go from there. Hope this helps........
Jeff
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post #3 of 14 (permalink) Old 03-19-2008, 06:05 PM
 
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Linda,

I am running 225x60x15's that are 7" wide.


67 Post Coupe,
69 RA III Judge
06 BOM, M6, 18's
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post #4 of 14 (permalink) Old 03-31-2008, 12:39 AM Thread Starter
 
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Wheel codes

Okay guys, I found on the internet that there are two wheel codes for Rallys on the 67. JA for disc brakes and JC for drum. What is the difference in the rims?
Thanks
Linda
PS I think I'll put 15x7's on. Someone suggested 8's would be cool, but are they too thick and will they rub on my 67?
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post #5 of 14 (permalink) Old 03-31-2008, 06:53 AM
 
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Garage
I Would Say The Offset Is Different
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post #6 of 14 (permalink) Old 03-31-2008, 07:40 AM
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Quote:
Originally Posted by blondie67 View Post
Okay guys, I found on the internet that there are two wheel codes for Rallys on the 67. JA for disc brakes and JC for drum. What is the difference in the rims?
Thanks
Linda
PS I think I'll put 15x7's on. Someone suggested 8's would be cool, but are they too thick and will they rub on my 67?
The JA code is correct for 67 and was used on drum and disk brake cars, the JA carried over to 68. The JC wheel was introduced is 68 and 69 and replaced the (JA).

The part number for the 67 Rally II (JA) was 9787279;
The part number for the 68 Rally II (JA) was 9781246;
The part number for the late 68 & 69 Rally II (JC) was 9789329;
The part number for the 70 Rally II was 546494.

The stock sizes for all Rally II wheels were 14X6 used on the GTO's.

Randy


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post #7 of 14 (permalink) Old 03-31-2008, 07:45 AM
 
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Originally Posted by blondie67 View Post
Okay guys, I found on the internet that there are two wheel codes for Rallys on the 67. JA for disc brakes and JC for drum. What is the difference in the rims?
Thanks
Linda
PS I think I'll put 15x7's on. Someone suggested 8's would be cool, but are they too thick and will they rub on my 67?
BTW, there are a couple of steering wheels for sale on E-bay.

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post #8 of 14 (permalink) Old 03-31-2008, 10:52 AM Thread Starter
 
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Rims

Thanks for the info! I was going to go stock with the redline wide oval 14x6 tires, but I think I'll go with the Rally IIs 15x7 with redline radials! I was cleaning out the trunk yesterday, and found that the center of the trunk was rusted. The sides are perfect. I found an ashtray! Which is good since I didn't win the one on ebay. I have no idea why it was out, but maybe the bracket was broken?? I also found an old Holly carb, air cleaner miscellaneous emblems and an old jack. That thing weighs at least 10 lbs by itself! Thanks for the info on the steering wheel, I'll check it out.

Linda
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post #9 of 14 (permalink) Old 03-31-2008, 11:27 AM
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Hi Linda. The 15x7's are an excellent choice and won't rub. The difference in the drum brake vs. disc brake rims wasn't the width of the rim, it was the spacing of the center of the wheel to the rim. The disc brake rims had a different center-to-rim geometry than the drum brake rims for one reason: to clear the disc brake calipers. The drum rim bolted to a disc brake car will hit the caliper. Disc rims can be used on drum cars, tho'.
Hope this helps.
Jeff
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post #10 of 14 (permalink) Old 04-04-2008, 07:42 PM
 
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I'm running 15x7's with 255/60s in the rear and 235/60s up front. I like the look and stance of the car. I think the 15's help fill the wheel wells much better.
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