I have beads in my rear tires (275/50 15) no problems, did two 1500 mile road trips with them.
The rears always required a lot of balancing weights so I went with the beads instead.

Old bookmark
https://www.balancemasters.com/

I have used dyna beads in a few different sets of tires on my jeep, mostly super swampers, and I have them in the front skinnies on the dart. I have never had any problems.

On my GTS with repro Bias Redlines and the factory mag wheel covers, I didn't want to put clip on weights on my nicely painted rims and stick on would look out of place. I used Counteract beads Counteract Beads. I used them on my trailers tires in the past.
They work fine for me. If the car sits for a long time, the first mile or two will have a shimmy, but it goes away fast. Bias tires have a tendency to take a set anyway when a vehicle is parked a long time, so the shimmy could be partly tires or partly the beads. Either way, it resolves itself. Given how out of shape my bias tires were when mounting, you would not get a true balance anyway until they were broken in a while.

On an every day ride with low profile tires, I would use stick on weights, but for a restoration project, the beads are fine. Use their website to calculate the weight you need and get them on Amazon.

Question... Would the weights need to be removed if using the beads? Or can I just leave them on?

I removed the remaining weights to clean up the rim before getting them balanced again.
The adhesive remained on that rim, it was the foam part between the 2 outer adhesive sections that gave out and separated.
So it was h*ll getting that adhesive off the rim and ended up removing the paint too.

No need for the old weights. I suppose they can stay on, but the beads are doing the work now.

I forgot to add that I put the tire assembly with the beads on the Hunter balancer just to see what would happen. Machine was giving errors for rim slippage, would not even balance. I think the beads spinning up during the initial measurement was causing confusion and assumed the rim was loose on the spindle.

Before the beads I was getting like 3.5oz weight readings and pretty terrible road force readings, nearly 30 lbs. And yes, my rims were pretty true, 2 were NOS. I measured runout prior. As mentioned those tires were way out of round. But they are so soft in the tall sidewall that I guess you can get away with it on the antiquated suspensions back then. New car, no way you could.

Are you saying that the beads stay in place during short stops? How would they do that since they are free floating inside the tire?

I believe that they fall to the bottom every time that the rotation slows enough or stops. And it then takes a bit of speed and a little time for them to get back to where they need to be. I have tried them a couple of times. They have their place. But for most around town applications, they are not the best choice.

No, beads don't stay in place. The Counteract beads are designed not to clump up with moisture, as some other brands do apparently.

I think what occurs, at least with these repro bias tires, is prolonged sitting causes substantial enough tire deformation that the the beads cant overcome initially. This is a big block car, so there is some decent weight on the front tires. Once the tire starts to get back into round (about 1 to 2 miles), the beads are able to balance properly. I have not tried traditional weights on these tires to know how they behave in comparison. I am good with what I have now and the beads.

You add beads based on the tire size, so I suppose if I put in a extra large mass of beads, maybe I would not have as much of a start up issue, but then rest of time would not be needed.