63split63

Does anyone Know if the centre cap on the 7" ralley wheel is the same depth ( or hieght ) as the 8" caps for the later wheels .

Regards Bill

MelWff

it's the same cap for all years using the ralley wheel

Mike Ward

Trims rings too!

martaroony

Hey guys this is most likely a good topic to post this Question..?

On a 68 , whats the difference with centre cap design..
I see some suppliers offer Crossed flags as well as "Chevrolet Motor Division" ?
Did 68's ever have the flags as well..?

Thanks Marty.

530planeman

Mike since the 68 used a 7" wheel I believe the trim ring is narrower ??
Wes

martaroony

I would have to agree with that , as most suppliers offer a 68 alone , different different to 69-82.

I could be wrong, but I also have read somewhere , that 68 centre cap was slightly different in the stainless dish part, the lip was supposed to be slightly more pronounced, however , don't quote me on that..

Easy Mike

Gents, this thread is from 2011.

62corvette

Mike is right. Same trim ring. Look at a correct 68 installation vs. correct 69-up. The inner lip of the trim ring is noticeably closer to the center web of the wheel. Same trim ring, different wheel.

Alan 71

Hi m,
Some confusion may be caused by the first rally wheel cap and ring which was used in the 67 model year and IS quite different than the cap and ring used for the 68 model year.
Some people like the look of the 67 cap with the 68+ ring on the 8" wheel since it gives quite a deep look to the wheel.
The caps without the "Chevrolet Motor Division" script, and caps with the crossed flags, are aftermarket caps and often made of plastic…. and their cost/value reflects that.
Regards,
Alan

gbvette62

As Mike pointed out, this is a 4 year old post, so it might have been better to start a new post......as the moderators like to say.

There is no difference in the "sombrero" style rally center caps used on 68's, from any other 69-82 Corvette rally center cap. The only marking on the caps was "Chevrolet Motor Division". The base of the caps were stainless steel, and the center section was chrome plated pot metal.

The exact same sombrero caps were also used on 15" Z/28, Monte Carlo, Chevelle, El Camino and Impala rallys, as well as 14" rallys on Camaros, Chevelles, and Novas.

Alan's correct in that the ones that are blank, or have cross flags on them, are aftermarket pieces, and not something GM ever offered.

The 68 15x7 rally, and the 69-82 15x8 rallys, both used the same trim ring. Only the 67 15x6 rally, used a different trim ring.

loup68

Original style reproduction GM four clip trim rings do fit on a 68 7" rim.
The problem that people have is buying the cheaper multiple clip aftermarket trim rings that some dummy designed with the wrong shape. The contour is wrong on them and they hit the shallower 68 7" rims. There may be a patent on the GM design of the trim rings? Lou.

Alan 71

Hi Lou,
Thanks, I didn't know that!
Regards,
Alan

loup68

I think that I found out that information on this forum, in the past. Luckily, I saw it before I bought new trim rings about three years ago. It is very tempting to want to buy the less expensive aftermarket ones that are easier to put on. They just won't fit a 68 wheel. Lou.

dugsgms74

SUPPOSEDLY...the early 68s(pre Jan 68) may have had a different cap. As I understand it the outside edge differed on the "ridge". Allegedly the early caps had issues with denting the "ridge" during installation so GM added a reinforcing "rib" just inboard of the "ridge" to strengthen it.

Keep in mind I read this on the NCRS forum and have seen pics to confirm it.

martaroony

Thanks to all that have chimed in with their bits of gathered knowledge.

dugs , this is the exact same info I have read some where , but couldn't remember where I had seen it .
Would love to compare the photos of the two, to see if I have originals , or replacements . Marty.

dugsgms74

Marty,
While I dont have a pic of a early 68 center cap I do have a pic of a aftermarket cap that I believe is shaped similar to alleged early 68 cap.
Heres a couple of pics, one of a OEM one and one of a aftermarket, notice the difference just inboard of the ridge.

Keep in mind this NOT a early 68 cap so these pics in no way prove or disprove whether or not the early 68 caps even existed. First pic is the OEM, second is the aftermarket.

martaroony

Hey Dugs , thanks for the photos, I do apologize for the late reply , 13 months to be exact, but have been out of the scene for a while , and have only now relogged back in, and found your reply.

Im currently going through a stack of wheel centre caps in order to sell off a few I dont need, and are obviously wanting to keep the best 4 originals for my car, however Im having trouble working out what's original and what's aftermarket.
All of them have some age on their side so they are in varying degrees of condition.
But the big question is what markings should the pot metal hat have inside it if its a genuine 68 cap.. most of them have a cast number 3925805 which I assume is right, however I'm guessing even the repops could still have that.
And some of them also have "Canada" written which im not sure if they would have been made there..?
Any advise on this would be greatly appreciated,
Thanks Marty.....

dugsgms74

Marty, I can only tell you what I believe to be true from what I can tell from the caps I have. I have around 15 caps, some repro and some GM. My repro caps don't have the part# on them, all the GM ones have the part#, some have "Canada" on them some don't. It seems to be that the ones with "Canada" on them are nicer/newer looking so I'm guessing(and its only a guess) that they may be over the counter replacements.

Alan 71

Hi,
The four original center caps from my 71 have 'Canada' cast into their inner surface.
Regards,
Alan

All four have the HB in the pennant, three have the 1, while one has a 2. (Mold number?)

dugsgms74

Well, there goes my theory!