Wonder if someone can help.
I recently purchased a vintage Raleigh bike to strip, re paint, upgrade a few components and re build.
As this would be my first time to build a bike, In the process of taking everything off the bike I made notes of locations etc. the old headset was completely rusted, so i bought a nice new shinny one. When I opened the box I noticed that the depth of one cup is slightly smaller than the other. As u can guess I didn't notice this when stripping the bike. And the old headset is the same. Can someone advise if there is a specific way the cups need to be. Ie bigger one on top, smaller one on bottom, or vise versa