I am looking for a decent quality step through bicycle (NOT Walmart) with hand brakes that I can mount a friction drive on. I looked a a Sun Revolutions 3, but it uses a wishbone type frame, so there is no place to mount the front clamp. I even looked at a couple of Walmart bikes, and they have the same design. Right above the rear brake, the frame converts from 2 tubes to one tube. I need a conventional frame that has double seat stay tubes all the way to the down tube.