Hi Everyone,just letting you all know that I have had an ELECTRIC BIKE CO,NANO motor which should have been fitted to a Brompton folding bike 16" wheel fitted into a 20" front wheel on my cheap folding bike,and as expected does well over that 15 mph with no noticable loss of low speed performance.It even wheel spins when stationary,( without me on it of course ) I have had this over two years now trouble free..If I decide to pedal assist it I pass many professional cyclists to there amazement 
Many thanks to Mr Tony Castles & co for their great work .. Cheers Jeff at Preston..
Many thanks to Mr Tony Castles & co for their great work .. Cheers Jeff at Preston..