Amazon.com: Customer reviews: SPEEDBOX for Shimano Steps E8000, E7000, E6100 & E5000 | Electric Bike Tuning Chip | Remove Speed Limit for Mid Drive eBike Motor
Shimano Steps E6100 - ein idealer Motor für City & Trekking e-Bikes - YouTube
E-BIKE E-MTB TUNING KIT PearTune for Shimano STEPS E8000, E7000, E6100, E5000 with Di2 – Two Wheels Empire