The brompton m3r 2017 folding bike is the original folding bike featuring bromptons m type handlebar the m type is bromptons first and original handlebar a 3 speed bsr hub the brompton standard range hub is an updated version of the original sturmey archer hub used on their first bikes bromptons are as simple and user friendly as they come using their patented folding mechanism no folding bike can fold as fast and as compact as a brompton can