Magnum 500 + 69 C-body drum brakes

Hi,

I´m dealing for a while with the brake shake, which turns out being problem with fitment of the Wheels vintage Magnum 500 and original drums. It does not seat properly due the ribs/fins on the outer diameter and are sticked out, while seating area is deeper. So only studs holds the wheel in place although it was not seating properly. I have not notice it due the centre caps mounted on the wheel.

Original wheels fits nicely and the braking shake problem is gone. It sits on the hub with diameter around 2,75inch, but Magnum 500s is just 2.125 in.

I believe, I have only these options:
1st. purchase different shape of the drum, like ie. RAYBESTOS Part # 1924R with sticked out seating area (would have to verify the drum size for correct fitment and estimate the hub diameter distance from the drum. Still deal with smaller diameter on Magnum 500 then original size wheel :-/ ) Can anyone confirm, the wheels sits on the hub correcly with the new drum?



2nd. make a front disc brake conversion. I believe a correctly selected disc would have a needed Center Bore Diameter 2.125in. I´m aware of all the benefits like a way better braking but not in the mood for +1000usd investment for conversion set right now.

3rd. change a wheels/tires to original wheels, get as wide white wall tires as possible (235?) and sell Magnum 500s

4th. use a small width spacer to seat the whell properly and forgot about hub for centric the wheel. But I think the lugs for centric of the wheel is just not enought. But on the other hand, this is how the rear wheels are mounted. It might also require to change to longer studs.

Whats your suggestion? Do you have any better ideas?

Original drum with hub


Magnum 500s inside view, notice the teeth from drums ribs


Current fitment. Not noticed before because of the centre caps


Wheels comparison



EDITED pictures, they were too big to display.

I couldn't get the attachments to open

Post deleted by 69topless

still cant but if you're good on your end then it must be an issue with my computer. Maybe someone else will chime in

drum pic only shows up

Might try posting them one at a time. I got the pictures to pull up by going direct to your hosing service. I would repost them here but they are 2 megs each so they will not fit on here.

Here are the direct links:

Original drum with

http://s21.postimg.org/sgh55j0li/drum.jpg

Magnum 500s inside view, notice the teeth from drums ribs

http://s12.postimg.org/mixf4b8gc/press.jpg

Current fitment

http://s21.postimg.org/5kijy1tc6/magnum.jpg

Wheels comparison

http://s11.postimg.org/alk7957j6/compare.jpg

Craig

The Magnum/Roadwheel relies on the lugs to center the wheel, and I understand the finned C body drum aggravates that issue....either change out the drums, or add a 1/4 spacer and use the correct lugs to center the rim, just make sure you have at least 3/4's of the studs length in the lugnut for proper capture

.

Thanks for hints to everyone. I have these lug nuts, as you post in the picture. I might prefer to change drum then add spacer and longer studs. My theory is, that Magnum 500s will seat properly on the new drum and even the hub will fit centre bore diameter of 2.125 inch at correct distance from the drum.

Anyone can confirm correct fitment, having the drum Raybestos Part # 1924R with the Magnum 500s?

That is some serious balancing weights on the new wheel, something not right there.

I have never seen fins wrap around the face like that before, not saying it isn't so as it obviously is, but I have never seen it. Only fix I can think of is different drums or a spacer.

Those finned brake drums can be replaced with regular 65-68 style drums. They swap directly. Been there done that

Perfect news,I will double check the fitment and replace the drums

EDIT: I have just found out the current drums are HD 3 inch. Replacing to only front drum found online mentioned above with dimensions 11" X 2-3/4 would require also to change to smaller brake pads.

Or I might just grind off the offending small portion of the inner ribs on the existing drum. What is your opinion about this possibility?

Quote:

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That is some serious balancing weights on the new wheel, something not right there.

I have never seen fins wrap around the face like that before, not saying it isn't so as it obviously is, but I have never seen it. Only fix I can think of is different drums or a spacer.

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The wheels are OK, were checked for damage by pros recently. Way to much of the weights is due the improper machine used for balancing with intension not to place the weights on the outside of the wheel. Will take it to other place for new balancing next spring.