Originally Posted by
dabac
The big question is, if you want to keep the classic look, why are you thinking about new wheels?
Nothing has changed that has made modern wheels noticeably less prone to flats.
Well, OEM wheels for a 1975 PX-10 would be tubular (aka "sew-up") rims, so switching to a clincher rim could arguably make them less flat prone; certainly easier to repair the flats that do occur.
If the hubs are in decent shape, rebuilding the wheels to use clincher rims could be a cost-effective solution, especially if modern wheels entail cold-setting the frame, updating the drivetrain, etc.