Bumble Bee Bolt-On™ opened its door back in 1992. We have been testing and improving our design for the past 18 years. Thousands of happy customers have enjoyed the bumble bee kit. Our design was patented in 1994. Our bicycle bracket has proven to be superior to all other friction driven kits with our simple design. We have also been able to achieve over a mph per cc with our unique design. I realized years ago that we were dealing with the simplest mechanical transportation other than a push scooter. We believe that the engine power pack should be as simple as possible and Bumble Bee Bolt-On™ has achieved this. So here we are today ready to serve you! Remember simplicity equals reliability. Enjoy and have a safe ride!