My generic $150 Amazon folding bike. The gear ratio seems too low for road use. Even in 6th gear I spin like nuts on the flats and don't seem to go fast enough. They probably put normal size gears on a 20 incher. Oh well. Should I rebuild it with BMX wheels/hubs as a SS freewheel or coaster brake bike? Does anyone enjoy their folding bikes? It's not too bad for commuting or basic off-roading though. I might put some Kenda Kwest or other colored BMX tires on it to make a more fun looking bike. The low gear ratio really bugs me though, which is why I don't ride it that much.