Are they the original hoops?

Cheers

may be out of round?

mike

No matter how you rotate it, it falls off in the same spot on the drum. More like a head problem, might be slightly sloped instead of flat in that area. I believe this may be a common single flange hoop issue. Yes they are original Nickel hoops.

The ole rim out of round problem.

Those rims were used when calf-heads were the only game in town. Calf heads have big rolled edges, modern heads do not. I'd try an Evans 360 (slightly larger than normal heads) or an Aquarian vintage.

Also... consider going with calf heads on the toms! I have calf heads on my mahogany kit and the toms kill with the calf heads. Just a thought.

John

On my snare the head fit is very tight. If the head is not completely seated rim will slip off. 360's work just fine on the toms. Won't fit the snare.

Creighton

Well I ended up bringing over a single -flange hoop I had in the drum hoop pile, one I'd saved from a student Gretsch drum many years ago. Problem solved, but the rim is chrome, not nickel. The Gretsch rim has a much squarer edge on the inside,where it hits the head hoop,and grabs it better.

Thanks for the update. Glad you were able to track down and solve it. Makes the drum a ton more enjoyable. Interesting topic and I'm sure a problem for many. I only have a few single flange hoop drums. The Radio King single flange hoops have a nice long "lip" on them. They extend a bit beyond the head hoop on the Evans G2 head. I also have a 20" floor tom. I got a pair of chrome over brass single flange hoops. Not sure if they are Slingerland. But the flange lip on those is a little shorter. On these the head hoop (G2) extends a tic past the flange end. As toms they are not high tension drums. So I can see how a snare under more tension could be more of a problem? I didn't check the inside bend angle of the hoops to see how straight it is. Next time they are off I'll compare.