I commute on a DaHon Curve SL (8-spd IGH). Pretty much stock except I added a rack, rack trunk and spd pedals (MTB type). My commute is 7.5 miles on the bike and 10 miles on the Green Line Metro Light-Rail one way. The metro is $1.50 each way, but otherwise no problems. Here is a photo of it all folded up, which it is while on the Metro. It takes about 30 - 35 sec. to fold or un-fold. Tires are Schwalbe Marathon Racers w/Mr. Tuffy tire liners. Bottle cage is by Karbona and is the only carbon fiber part on the bike.

Rick / OCRR