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.
Quote:
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.
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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
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