INTERNAL GEAR HUB: SRAM Spectro T3
This tried and true hub is the most popular hub gear on the planet. Literally tens of millions have been sold over the last several decades. In a recent independent study the Sram hub was found to be even more efficient than most derailleur systems. The beauty of this hub is that all of the gears are totally enclosed and virtually maintenance free. The coaster version of this hub features a back pedal brake that is also enclosed within the hub, so that it delivers flawless braking performance in any kind of weather.