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2019 GNG Premium 24V/36V 450RE mid drive kit

(Compatible with 68/73/83/100/120 mm bottom bracket)

USD 358

Ultralight weight! 3kg system!

New product discount!


Price with controller and twist throttle already!

Order now (68mm/73mm version) : USD318

Order now (83/ 100mm/ 120mm version) : USD 338

Order now (Optional 32 poles PAS Sensor) : USD 28 with shipping

Directional sensitive. Only forward signal will be translated to pulse signal. (3 pins) (5V, Gnd, Signal)

Please note that you need to program your controller/ Cycle Analyst to make this work properly.

The inner diameter of the magnet rubber ring is 24mm, which will fit perfectly on all GNG ISIS bottom bracket.

It can be directly press mounted onto the left BB Shell. 

Package details

The kit includes everything except the batteries to convert your bike into an awesome ebike!

All replacement parts are available at reasonable price. No worry for the maintenance.

- 24/ 36V 450W MOTOR

- Double Freewheel crank set (42-42T) / Optional Triple Chainring crank set (42-42-32T) (+USD25)

- Bottom bracket spacers

- ISIS bottom bracket

- ISIS crank arm

- 7075-T6 Mounting Bracket

- Cable tie or horse clamp

- Carbon fibre cover

- Integrated Tensioner

- 24/36V controller

- Twist throttle

Motor unit

- 7075-T6 Alumium anodized lightweight rigid bracket (Never flex!)

- DnP best freewheel (Equivalent to ACS crossfire) (13T drive freewheel and the 67BCD 5 holes freewheel on crank)

- Anodized red components

- Carbon Fibre chain cover

- 7075 Aluminium tensioner with improved design and spring system

- KMC high quality single speed chain.

- Double or triple chainrings available

- ISIS High quality Taiwan Made bottom bracket

- Ultralight ISIS crank set

- Optional 32 Poles PAS sensor (custom controller needed)

- Extra bearing on the crank for extra durability

Bottom bracket set

Freewheeling Crankset

Thanks to the double freewheeling clutches system, cyclist do not need to pedal while the motor is working, and while the cyclist is pedalling, the motor won't rotate. It also enables the motor and the cyclist to work together to output higher power to the rear wheel.


  • 42T- 42T Front sprocket (optional 42-42-32T + $25)

  • GNG Crank set with DNP freewheel and extra bearing support

  • Possible to use with existing derailleur for gears change

  • Taiwan made high quality ISIS bottom bracket

Replacement parts

Though the kit is built with premium quality, there are still needs for replacement parts for maintenance.

We sell every part in this kit so that your electric bike kit will last forever. The parts are at reasonable price.

Motor dimensions

Centre to centre distance: 143mm ( bottom bracket to motor output shaft)

Installation guide

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