The Japanese firm Shimano has just taken a new step in the integration of its electric motorization and transmission systems. A new version of its EP8 engine (EP801), which powers a number of eMTBallows you to combine it with the Di2 electronic derailleur and benefit from a change of speed automated.
Based on the information provided by the sensors speed and cadence, the system automatically selects the correct cog to ensure easy pedaling uphill. Downhill, when the bike is freewheeling, the derailleur switches to low gears to avoid chain jumps and provide good pick-up. The system can be disengaged in manual mode for those who wish.
The EP8 and Di2 combination also offers a FREE Shift mode that allows you to change gears without pedaling. Mountain bikers with committed riding can thus change gears in the turns to better prepare for a relaunch.
Shimano offers two versions of this electronic derailleur: the XT Di2 LinkGlide M8150 combined with an 11-speed cassette; The Deore XT Di2 HyperGlide+ M8150 with a 12-speed cassette. For the moment, this equipment will only be available as original equipment on Electric mountain bikes new.