I recently purchased a TMX Tri-Aid tricycle for my wife to use in our campground. The trouble is the chainring is so small it has difficulty getting out of its own way let alone climbing any incline. My question is: Is anyone familiar with this brand and if so, can the chainring be replaced with a larger one (say 32T vs orig. 20T) safely to increase power to the wheels while pedaling? What size chain should I buy to replace the original? Finally, how difficult is this project? Thanks in advance. Tom W.
