Chain tug mech hanger thingy and cold set to 130 mm. Or a freewheel block. Fancy SunXCD 120 mm cassette hub is also an option. Why'd you need to get a disc mount brazed on?
If not fixed gear then would need rear brake, and as I've a raw frame it'd be rude not to go double disc as I already have front disc set up
@deleted started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
Chain tug mech hanger thingy and cold set to 130 mm. Or a freewheel block. Fancy SunXCD 120 mm cassette hub is also an option. Why'd you need to get a disc mount brazed on?