Another 37% increase in gear range on top of the already +37%?
From Dahon's site for 2005 Boardwalk D7:
In 2005, the Boardwalk gets its most stunning make-over yet, with new Fusion technology that integrates the fork, frame and handlepost and improves torsional rigidity by over 35%. The D7 model also gets an upgraded drivetrain with a revolutionary new 7 speed Dahon Neos rear derailleur and 11-30T freewheel that increase the gear range by 37%.