Dual drive bike conversion kit fits any bicycle and turns it ino a total aerobic fitness bike.

dual drive bicycle gives the rider a total aerobic work-out

Fits the down tube of 100 million bikes at least! You can use hand brakes but I think its cleaner with a coaster brake. You can use a coaster brake with the Shimano internal shifting hubs and they utilizes 7-8 gears that have a range equal to a 21 speed bike.

Front end conversion “kit”, fits the down tube of any bicycle and replaces the front fork, the front wheel and the handle bars and adds a shaft drive that runs down inside the right side triple “T” fork. Basically, you get a new front end! So, any cool frame design just got whole lot sweeter looking with a bunch more function!