I can't see any reason why a decent framebuilder couldn't braze in a new headtube. It'd need recoating afterwards, and the total cost may well end up being close to the cost of a new frame. However, I'm a bit confused by the reference to aluminium welding - the headtube on a Brompton is steel?
I can't see any reason why a decent framebuilder couldn't braze in a new headtube. It'd need recoating afterwards, and the total cost may well end up being close to the cost of a new frame. However, I'm a bit confused by the reference to aluminium welding - the headtube on a Brompton is steel?