Originally Posted by
Aussomeman
Is it possible to drill out a 1" head tube to enable the use of a 1 1/8" headset and fork, or would the structural integrity of the frame be compromised? I'm looking at purchasing a rigid steel frame with a 1" head tube for a singlespeed project, and I'd like to be able to use the fork(s) I've already got (both are 1 1/8) with it. I could swear I read that this was possible online somewhere. I thought it was at Sheldon Brown's site, but I can't seem to find it again. Thanks in advance!
There likely is not enough material in the head tube wall, and if there was there wouldn't be enough material left after reaming. Any older 1" suspension forks I wouldn't use, especially any old Scott's, Manitou's, people have died instantly when a fork has suddenly broken.