Shimano Nexus 7 speed Wheelset (front & rear wheels), as used on hub gear models of Dahon, Tern and Bickerton.  Narrow 74mm front hub width, and 130mm rear.  Supplied as a complete kit with all the fittings including the Shimano Nexus twist shifter, 20T Sprocket, Washers and Nuts for horizontal dropout as used on the hub gear folding bikes.  Will not suit folding bike designed for derailleur gears with vertical dropouts (unless you use a tensioner).  Size 20" 406.  Designed for use with tyre width 20 x 1.50" - 2.00".  Singlewall Black Aluminium rims, Stainless Steel Spokes. (28 front - 36 rear) Q - release Front Hub.