Originally Posted by
dddd
It sounds like the same Supercourse curse that plagued my '77 SC with Weinmann Concave rims and ever-flat tires.
The bike was stolen in early-1979, it was orange, about 23". Maybe the same bike?
I thought I had the problem licked after discovering machining burrs inside the rim cavity from post-wheelbuild spoke shortening (done at the factory!). I filed and sanded the entire periphery of the rim's internal hollow bumps, but if this is the same bike, perhaps it wasn't enough?
So, it's a Raleigh, so first I'd check that no spoke length adjustments were done with a grinding wheel, post-build.
The Raleigh SuperCurse.
That really sounds plausible and may account for some, but truly - this phenomenon is not limited to Raleigh or even post-build shortening of spokes.
(I never could comprehend how they allowed that on Factory-built wheels!)