eSHIFT WITH NUVINCI
With the electronically controlled NuVinci H|Sync (technology
from Fallbrook), you set the desired cadence (between 30 and
80 pedaling rpm) using the Bosch Intuvia computer. When your
pedaling cadence goes over the selected cadence, the bike
shifts to a higher gear. And when the cadence drops, the hub
will automatically downshift. When you stop, the bike downshifts so you are ready to take off. You can also manually shift
using the Intuvia remotely. Based on these adjustable specifications, the NuVinci regulates the gear ratio depending on topography, motor support and personal effort.
eSHIFT WITH SRAM
With the SRAM Dual Drive 3 Pulse, the shifting operations
are automatically controlled in three levels based on the current
speed. The gear is indicated on the Bosch on-board computer.
It is possible to combine the gearbox rear hub with a sprocket
cassette for a wide gear range.
eSHIFT WITH SHIMANO
Shimano’s Alfine Di2 (Digital Integrated Intelligence) 8- or
11-speed Nexus gearbox hub system is operated with a shift
paddle independently of speed and cadence. A servo motor
near the hub makes the gear selection specified by the cyclist.
The intelligent on-board computer also recommends the right
gear, in terms of maximum efficiency, in an additional indicator
on the Intuvia display.
It’s with increasing comfort and safety for e-bike riders in
mind that Bosch developed their eShift system. As one Bosch
employee said, “Our goal is to provide technology that lets
the rider concentrate more on the ride and less on shifting.”
Concentrating on the ride, that’s never a bad thing.
If you are using the Nuvinci hub, the Intuvia display
looks like this with the cadence displayed.
Bosch had this clever exploded view of the
Bosch Gen 2 drive unit for those wondering
what lies inside the motor case.
This is what the Intuvia display looks like
with a SRAM eShift-compatible hub.