AFAIR, the prototype looked quite similar to the production Sinclair trike; the changes were to the drive train.
There was another, pure pedal trike that was a proper tadpole, produced in Kent, WA USA. It had unusually small front wheels, but the prototype was as good a ride as many Greenspeed competitors. Then it came out with an "off road use only" warning, because the production guys had decided that plumb kingpins should be fine.
|