The Flexity Swift tram is a light-rail vehicle manufactured by Bombardier. Most models follow a 70% low-floor design in order to allow access to those in wheelchairs, though some of Cologne's fleet use a high-floor format with level boarding platforms instead, in order to retain compatibility with stations built for older trams. They are bi-directional, with cabs at both ends and doors on both sides, and are articulated with three sections (the centre section is very short on most trams, but can be replaced with a longer piece in order to increase capacity, as London is considering doing for future lines). The trams can be coupled together into trains, and can safely reach speeds of 80 km/h when running on dedicated lines. Systems using the Flexity Swift tram include Cologne (for which it was originally designed), south London's Tramlink, Istanbul, Rotterdam, Stockholm, and the Minneapolis Hiawatha Line.

The Flexity Swift's closest competitors are ALSTOM's Citadis and Bombardier's other Flexity trams (including the Outlook , Classic , and Link ).