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Tuning de-restricting a Bosch Gen 4 eBike VOLspeed chip - YouTube
SPEEDBOX 3.0 for Bosch / eBike Tuning, also for Bosch engines of the 4th Generation / Smart tuning chip of the 3rd Generation incl. 1 crank puller : Amazon.co.uk: Sports & Outdoors
SpeedBox 3.0 B.Tuning for Bosch E-Bikes– E-Bike Tuning
Speedbox 3.0 B.Tuning for BOSCH 2017-21- Anti-Theft Tuning