2016 GNG Premium belt mid drive kit
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CAN WORK with both 73mm bottom bracket and 68mm bottom bracket



Product description

  • Handle up to 2500W power (Mechanical part) (Please buy your own controller) (Controller supporting cycle analyst is recommended) 
  • High reduction ratio from the motor to the crankset (1:33.3) provides tremendous torque and suitable human pedalling cadence
  • Top speed with 26" bicycle: (With 48V batteries :~45kph, with 64V batteries: ~60km/h, with 72V batteries: ~70km/h)
  • Triple chainwheel with extra bearing (32T / 42T) For bicycle / 80T (For 219H chain from motor)
  • 148mm taiwan made ISIS bottom bracket
  • Bracket compatible with both 68mm and 73mm bottom bracket bicycles (>90% of the bike compatible)

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Package details

  • 1x Motor with belt reduction unit
  • 1x 48V-64V Controller with current limit set to 31A (default)
  • 1x 148mm high quality ISIS bottom bracket
  • 1x Thumb throttle
  • 1x 102 links KMC 219H chain
  • 1x 170mm long ISIS Crank arms with standard 1.37" x 24 TPI  thread 
  • 1x 5 pin yellow electric wires connectors box
  • 1x Three pieces crank wheel 32T/ 42T/ 80T
  • 1x Bottom bracket spacers for 68mm/ 73mm bottom bracket
Whole package approx. 7.5k 
Motor reduction unit approx. 5kg, crankset with bottom bracket aprrox. 1.8kg

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Motor unit

  

FEATURE:

  • Temperature sensor in the internal core compatible with cycle analyst V3 ( 10K NTC thermistor with a beta constant of 3900.)
  • Thick motor wires handling up to 50A continuous current.
  • Compact aluminium body with maximum amount of copper mass
  • Handling up to 72V at 40A

REDUCTION UNIT
  • 25mm htd 5m 16T/80T Belt system with bracket tensioning system.
  • 12T/80T 219H chain secondary reduction with redesigned tensioner wheel
  • Resultant reduction ratio 1:33.3 which suits the human pedalling cadence

MOTOR SPEC.:
  • Weight 2.68 kg
  • Rm 73 milliohms (phase to phase)
  • Kv 67 rpm/V
  • Kt 0.143 Nm/A
  • Km 0.53 Nm/√W
  • Specific Km 0.20 (Nm/√W)/kg
  • Rotor OD 79mm
  • Stator OD 119mm
  • Stator ID 79.8mm
  • Stator thickness 25mm
  • Lamination thickness 0.5mm
  • Magnet thickness 4.2mm

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Bottom bracket set

  

3-pieces 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.


Details
  • 32T- 42T Front sprocket
  • 80T 219H chain outer sprocket
  • GNG Crank set with free wheel and extra bearing support
  • Possible to use with existing derailleur for gears change
  • Taiwan made high quality148mm ISIS bottom bracket


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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

Please visit our part store!


The completed conversion: (We will upload installation tutorial very soon!)


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Shipping policy

  1.we will  arrange this item for you within 10 working days after we  receive your payment  

  2.For this kit , we only offer speed post (Expedited shipping)(USD 143) Normally will arrive in 3-7 working days.

 

Please be reminded that sea mail may require longer time(it may exceed 7 to 10 weeks due to the tightened custom inspection.) Any complain about the duration of shipping will not be accepted. Please choose the shipping method carefully. Thank you.

 3. All items  will be shipped to buy's paypal address. Please check  your paypal address correctly. 

  4.International  Buyers – Please Note:

  a) Import  duties, taxes and charges are not included in the item price or shipping  charges. These charges are the buyer’s responsibility.

  b) Please check  with your country’s customs office to determine what these additional costs  will be prior to bidding/buying. While we will declare lower price and mark as  a gift.

  c) the package  sometimes may be delayed due to customs inspection or holiday delay.

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Payment

  We accept payment via paypal.

  1. All The Buyers must submit payment  within 7 days of auction close. If payment is not received, the item will be  relisted, a NON-PAYING CLAIM alert will be filed.

    2. Unpaid dispute will be filed to ebay for the non payable bidders