Xtracycle

This kit transforms a regular bike into an SUB (sports utility bike) by extending back the rear wheel and adding a seat and baggage platform. I've had my SUB for two years now. I find it makes owning a car completely unnecessary! I've transported my folding kayak on it. I've taken my girlfriend and her Australian Blue Heeler on it. I've moved furniture. It's crazy how stable it is. In many ways I prefer how it handles to my regular bike! And for giving people tours around NYC people just LOVE it. You can modify your bike yourself, but I ended up taking it to a bike shop to have it installed.