Cheap chainset most likely uses JIS Taper BB. Campag will take ISO. If you haven't changed the BB as well as the chainset, your chainline will be off due to mixing components.
@pifko started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Cheap chainset most likely uses JIS Taper BB. Campag will take ISO. If you haven't changed the BB as well as the chainset, your chainline will be off due to mixing components.