THIS IS TO FIT THE LAST OF 20" 406 WHEEL MU UNO's AND DOES NOT SUIT THE LATER  MODELS THAT HAD 20" 451 WHEELS.  It's not the Kinetix Comp or WTB rim but a later double walled Rim type.    110 mm dropout width required.  (MANY MU UNO's have 115mm frames)

To suit Dahon Mu Uno  single speed Histop Chrome Coaster Hub . Supplied with wheel nuts, Black 406 Double Wall Rim . Supplied with rear sprocket.