Chevrolet C60s - Front Wheel "shimmy"

[motto (RIP)]

Originally Posted by Lynn Eades

Phil, the wheels are forged and I think that "eccentric" extra bit, is commonplace. The military Dodge rim was factory balanced. (welded on steel weight) I assume CMP wheels were as well.

The welded steel weights on the 3/4 ton Dodge wheels (I think supplied by Budd) seem to be a standard weight in a standard position to compensate for the valve stem cutout. I suspect they were not individually balanced though I have not compared wheels to confirm this. It would be an oddity if they were as I don't know of ex factory weights on Jeep or GMC/Stude wheels etc.

David

[Lang]

These balance beads work absolutely wonderfully. They take into account any unbalance caused by bearings, drum weight, wheel weight and tyre weight and even slightly out of round.

The physics behind them is very complex but they are very widely used, even on 200mph race cars. They are relatively cheap and many brands.

[Tony Smith]

Do they work with inner tubes? I understood them to used by putting a handful inside tubeless tyres when fitting to the rim. Would you have to remove the valve from the inner tube stem and feed in each bead one by one through the stem?

[Lang]

Tony

You can get small size balls to feed into a tube stem.

I saw a set of tyres (tires) fitted in USA for a Dodge WC and the kit came with the balls and a little funnel arrangement. Took some time and a little jiggling but the result was perfect.

You are right about the tubeless tyres, just throw in the bag, which quickly disintegrates to release the balls when fitting the tyre to the rim.

There is also heavy liquid to do the same job on the market which I presume would be easier for tubes. Motorcycles use this a lot.

Antique and Classic Car owners have discovered Dyna Beads®!
Classic Car and Antique Automobile tires, whether tube or tubeless, need Dyna Beads®. This long era of automobiles and the styles of tires that were used back then lend themselves perfectly to using Dyna Beads for tire balancing.

If you look at this video at around 2.25 minutes you will see a valve stem filling system.

https://www.youtube.com/watch?v=z4h0H7ycIBg

Lang

[Phil Waterman]

Hi

Simple caution about using Dyna Beads, be sure to use good metal value stem caps. Reason I say this is that years ago had a version of the beads put in the tires of my C60S tires by a heavy truck tire shop. No problem airing up the tires but later after adjusting air pressure down the the stem valves would not always seal complete. Blow a little air in problem would go away. Replaced the stem valves, same issue bleed air out valves would slow leak, quick blast of air in they sealed again. As a precaution replaced all the plastic value caps with good metal ones.

Now as to did the beads balance the tires no. These were used 11:00x20 military tires probably 50% tread cronic out of balance in the end replacement was the only fix.

Cheers

[Bob Carriere]

Tried twice getting the wheel balanced at commercial truck shops.....one look at the wheel/1050x16 none were interested citing various reason...... will not fit there machine...... we do not spin balance on the truck....... a few ounces will not mean much against the mass of the tire wheel combination.

Suggested moving the tired in different location and play with tire pressure snd that resolved 90 of the problems.......Shimmies now at very top speed of 44 or 45 MPH and since I find that speed dcsry the more comfortable 35 mph has no shimmy.

Even a guy in the States that had 900x16 (power wagon)shaved and claims they are now smooth as silk BUT tires had to be marked for corner location and same bolt pattern for each wheel

Considering beads now.......

What experience do others have had........

I have a new spare set of Michelin 900x16 to try out next SUmmer.

Cheers

[cordenj]

I had also wondered about using these beads:
http://www.dynabeads.co.uk/dynabeads_4x4.php
But as the shimmy was not such an issue after other upgrades had not pursued further.

I know they are being used on vintage Rolls Royces...so should be ok for CMPs!

[motto (RIP)]

Originally Posted by Bob Carriere

I have a new spare set of Michelin 900x16 to try out next SUmmer

If the present day Michelins are as good as they used to be you will have no trouble with balance.

David