United Recruit RN4 2012. A brand new model to the recruit line up, which now means we have a bike with a 21″ top tube at a more affordable level than ever before. Carefully colour matching graphics and accents keep these bikes simple, and easily customised by changing up one or two low value items to really give your own ride that personal touch. The top tube gussett and extra cromo mean this is strong enough to withstand the pressure that someone who needs a 21″ would put on it.