After realizing that my Downtube 9FS was my favorite bike because of the small wheels and the seating position, I decided to either sell or to modify my other two 26" wheel bikes to be 20 inchers.
Here's a previous Frankenbuilt mountain bike converted to 20 inch wheels. I had to add an extension to the front of the swing arm. I added the seat tube relocation triangle to mimic the Downtube seat to crank relationship.
The smaller wheels reduce the trail a lot, giving very quick handling. This is OK for me, since I make a a lot of 90 degree turns on sidewaks. But this isn't for everybody.
(Moderator: any chance of merging all these mini velo threads into a seprate "Mini Velo" Section? Thanks
http://www.bikeforums.net/folding-bi...-velo-mtb.html
http://www.bikeforums.net/road-cycli...oad-bikes.html