g-boxx.orgg-boxx.org - research institute for gear box transmissions
Whereby the rear hub contains a planetary style internal transmission system. In this case, the cassette, front chain ring assembly and both front and rear derailleurs are not necessary, thus providing for a more simplified gear change mechanism. All the major disadvantages and caracteristics of these systems are discussed in the Tech talk/Faq 06. Or also called Internal Transmission-Bikes.