Bought a frame a while ago, SH but unused by previous owner. Came with headset cups installed, and bearings in a box. Top bearing wouldn't drop in.
Looked like the cup had a flat spot, so I knocked it out and pressed another one. Bearing dropped in fine to the other one when not in the frame, but once installed was a very tight fit, needed a tap with a hammer to seat, and felt super tight once in.
My theory is that the HT is slightly undersized.
Went to a bike shop, asked if they could do head tube reaming, guy looked confused, went into the workshop, came back out and asked if I meant facing. I said no and told the whole story, and he said it's not something they do.
Does my diagnosis sound reasonable, and was the shop just a bit rubbish? Should I expect to be able to find a shop that can do it? Tools seem available but expensive.
Or should I just get some 240 grit out?
