OEM wheels for 75 CDV

[jaydog]

A couple of my wheels are not true, got tweaked over 45 years.  The parts manual lists 1493833 as the part number.  A Google search doesn't turn up anything, thinking I have to have some made.  The shop manual says15X6 JK, offset .29 in, 5 bolt, wheel ID - SC, drop center, bore 78.1.  A wheel reference site says 7JX15ET10 for a 235X75R15.  So, shop manual says 6 IN, the wheel reference says 6.5.

I emailed Detroit wheel for info.
Does anyone know of a source for new wheels, or used steel that are true?

BTW, I don't really care of they look like the originals because the wheel covers will be on them....just want something that will fit.

[TJ Hopland]

Do the 75's wheel covers grip on the very outer lip where the weights are or is it further in on the first flat area?

[jaydog]

Outer lip

[Big Fins]

Then you will need Cadillac wheels. They have a wider outer lip in which to hold the 'tangs' of the wheelcovers.

[35-709]

These people might be worth a shot.

https://www.originalwheels.com/?gclid=CI7uhPXTy8QCFY-HaQod_ZkAoQ

They used to list '70s wheels but I don't see the listing for that far back anymore.  Worth a phone call though.

[jaydog]

Tried them, no luck.  Most of it is the tires.

The Coker American Classics I bought for my Cadillac back in September are quite out of round. I have had them balanced 5 times and they still are not right. I bought them on Amazon via Jegs for $660, free shipping, no tax. Today I went to Discount Tire and ordered some Vogue Classic White (without the gold stripe) tires with the 1.5 inch whitewall, which are getting good reviews. I have always had trouble with Coker Tires, I don't know why I bought these. Anyway, the point of this is to let you know that when I called Jeg's today to see what kind of credit I could get, they offered a full refund and free shipping back!

Customer service is important and Jeg's knows how to do it right!

[TJ Hopland]

Even with modern tire balance machines properly balancing a tire is an art and there just are not many artists around.  Getting a result on the machine and getting a good balance are 2 different things. 

I think a lot of shops blame the wheel because they didn't sell it.   I have had several shops say the wheel was the problem so I brought them different ones.   Guess what?  That didn't help, the new wheel must be bad too.   In every case I eventually find a shop with a tech that knows what they are doing and I finally get a good balance.   Sometimes that involved a different tire too.

[Big Fins]

I have current wheels on my Eldorado that when put on a balance machine are clearly bent/out of round. It makes the Cadillac ride like 1970 Corolla.

When you strip a tire and wheel assembly of it's weight and spin it up, the computer states where to put the weight. You place the amount of weight needed in the assigned position and spin it up again.

Now it calls for another 3/4 oz. The real trick to balancing is to take the first weight you put on, set the machine to where it calls for the additional weight and then move the existing weight half way toward the stated position of the 3/4 oz weight.  Then spin it up again.

These kids today will tack on 5 ounces of weight in opposing positions because that's where the machine says to put it. I was taught the old school way, which in my eyes is the correct way. A tire only needs one weight. If it needs more than 2 1/2 oz, break it down and spin it 180^o on the rim and try again. If that doesn't cure the excessive weight problem, the tire is defective.

[jaydog]

Took the Cokers off today///had 4K miles on them...Jegs is giving me a full refund.  But, found this bubble on the RR...a blowout waiting to happen on these junk Cokers.  Discount tire balanced the new Vogues to perfection, none of them out of round and totally blemish free with one of the best white walls I have ever seen.
Car drives like a Cadillac now, so smooth, I am very pleased.

[V63]

I have them available removed from 1974-76 cadillacs. They are arizona, rust free (save for light surface rust). $45 each plus shipping from 85004. Since you are having an issue I could roll them on cement to check for trueness?

[Big Fins]

V63...it would be a matter of mounting them on a hub and spinning them to check for trueness. Unless severely bent, just about any wheel will look straight as it's rolled on cement. The front wheel drive offset rims being the worst because tire changers were never taught the correct way to remove the tire from these rims.

[Eric DeVirgilis CLC# 8621]

In 1977 Cadillac made a point of mentioning "match mounting" of wheels and tires whereby the high point of the wheel was marked by a dot painted on the wheel with another dot indicating the low point on the tire. The resulting cancellation was said to provide extra smoothness at highway speeds.

On a set of tires I just had installed, I instructed the shop to match the dots up since they were still plainly visible on the wheels (and on the new tires) and it seems to have worked well.

[V63]

One dot was yellow if memory serves, the other blue.

[V63]

V63...it would be a matter of mounting them on a hub and spinning them to check for trueness. Unless severely bent, just about any wheel will look straight as it's rolled on cement. The front wheel drive offset rims being the worst because tire changers were never taught the correct way to remove the tire from these rims.

That could also work, too much effort.

[Big Fins]

Then you will never get a true runout on the wheels.

[Big Fins]

In 1977 Cadillac made a point of mentioning "match mounting" of wheels and tires whereby the high point of the wheel was marked by a dot painted on the wheel with another dot indicating the low point on the tire. The resulting cancellation was said to provide extra smoothness at highway speeds.

On a set of tires I just had installed, I instructed the shop to match the dots up since they were still plainly visible on the wheels (and on the new tires) and it seems to have worked well.

I was taught by GM tech that the dot on the tire was to be lined up with the valve stem. The tire was static balanced to be placed in that position on the wheel. Eric, you matched the dots, but where on the wheel were the dots? At the valve stem position? GM Technical School didn't teach up this for no reason. This was also in 1974. Times change.

[The Tassie Devil(le)]

Yes.   The dot is to match up with the valve stem.

Bruce.

[V63]

My understanding, per 1977, is as Eric described. The dot location varied on the wheel dependent on its manufacture characteristics.