[mushroom]

What about a Hill Topper for a 20" Folding Tricycle (Worksman Port-O-Trike)? 3 speed shifter. Front fork is wide enough I am 79 years old and need the exercise, but need help on the hills of West Virginia. No 20", am forced to go with friction drive at $100 more cost. There are alot of these 20" Trikes out there !