Just know if you do not use the stock hubs in front and back, you WILL have to file (or grind) the drop outs to fit the axles of the new hubs. make sure you file the correct sides of the dropouts.
file the bottom of the back dropouts, and the back or trailing edges of the front fork drop outs. If you file the wrong edge, you will be adjusting the bikes wheel alinement and that is BAD...
Drop out work...
http://web.mac.com/phatatude/Green_S...ind_On....html
Hey you guys, just remember the R-20 was one of the last upright bikes Sheldon (the GREAT) was able to ride and enjoy. He said that the low single tube allowed him to get his leg over, so the Twenty was one of the only bikes in his stable that he could still ride.
R-20's : Your mums ganna have the coolest grocery getter around...