Joined: Jan 2010
Posts: 9,814
Likes: 1,790
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
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.