Planetary bushings in comparison with the classic gearshift systems of a narrower range of gear ratios. The overall transmission ratio of the bushing does not increase in proportion to the number of gears.
For example:
The 3-speed planetary bushing Shimano Nexus has a total gear ratio of 186%.
7-speed planetary Shimano Nexus has a total transmission ratio of 244%.
The 8-speed planetary bushing Shimano Alfine has a total gear ratio of 306%.
