The Xtracycle Leap extension is the backbone of any successful long-tail cargo bike conversion. This kit allows you to convert almost any 24", 26", or 29" bike into a long-tail cargo hauling machine. The long awaited Leap is a fully re-engineered take on the original FreeRadical bolt-on cargo kit, with large rectangular frame tubes that are stiffer and stronger than the original. This bolt-on unit extends the length of any bicycle by approximately 18 inches and allows the use of Xtracycle racks and bags. It will accept disc brakes so a bicycle with rim brakes can be easily converted to discs. This kit is also compatible with various speed cassettes and derailleur’s so even a single speed bike can be upgraded to a geared bike using the Leap kit. The Leap works very well with mid-drive electric bike motors.