Vertical dropouts have been around from at least the 30's, on bikes fitted with mudguards, so the wheel can be dropped out without fouling on the guard.
@chater-lea started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
Vertical dropouts have been around from at least the 30's, on bikes fitted with mudguards, so the wheel can be dropped out without fouling on the guard.