Gear Sensor by Agentura Repro Use GearSensor with any 8FUN

Use GearSensor with any 8FUN BBS unit conversion kit to get more out of your kit and to look after the gears on your bike

Configure up to two batteries each with their own details and Low Voltage Cutoffs

You're going to need a replacement to get rid of your error 21 (no speed sensor signal)

now with factory options for normal 68-73mm cranks as well as wider fat bike cranks (factory order)

Please ensure you order a freewheel with your kit if you don't have one ready to go

Gear Sensor by Agentura Repro Use GearSensor with any 8FUNPatented and built by Agentura Repro s. r. o. from the Czech Republic, GearSensor is an intelligent gear shift system for derailleur and internally geared hub bicycles using a mid drive power unit, configured for 8FUN BBS01 and BBS02 conversion kits. GearSensor is the undisputed authority on design and development of this device which solves a common issue that all mid drive (crank drive) electric bike drive systems are prone to. All electric bikes