Electric Folding Bike GBE-M20
L. David Roper
5 April, 2016
Rider Roper in sapphire
On 30 April I 2013 received the GBE-M20 electric folding bike. Some of the features of the bike are:
- Aluminum-alloy-6061 frame
- Lithium-ion-LiFePO4 battery, 36-volts, 10-Ah (0.36 kWh), 10-lbs
- Brushless DC permanent magnet 250-kW motor rear-wheel drive
- Electric pedal assistance (pedelec), 3 torque levels, changer on left handlebar
- Manual electric throttle mode on right handlebar
- On/off switch on left handlebar
- On/off switch on battery case
- Battery SOC gauge with 4-levels lights on left handlebar
- Battery SOC gauge with 4-levels lights on rear of battery case
- Keyed lock for battery
- Charger for battery (green light when plugged in and not connected to battery and when battery is charged, red light when charging battery
- Charge time: ~4 hours when empty
- 7 speeds, changer on right handlebar
- Front disk brake, right brake lever; actuates brake light on rear of battery case
- Rear tire-friction brake, left brake lever
- Weight: 40-lbs with battery
- Range: ~20-miles
- Speed: 18 mph
- 20" wheels, quick-release front wheel
- Maximum load 320-lbs
- Colors: Orange, pink, sapphire
- Lights: front and rear brake light which turns on when front-wheel brake (right brake lever) is actuated
It is not an electric bike that yields more electric power depending on the force on the pedals; instead a set force on the pedals actuates a specific electric power according to 3 options on a handlebar control. The handlebar throttle gives the maximum electric power when fully engaged.
Always keep the battery lock on when riding; turn the key clockwise to lock the battery.
To remove the battery, turn the key counterclockwise and reach under the back of the battery to pull it out; it may take a considerable force to get it started.
I had very little trouble setting it up. An e-mail to GBE settle all my issues.
The only design flaw I have noticed is that the pedals are supposed to be pressed by feet on only one side, which is sometimes difficult to achieve. My main problem has been getting my feet on the pedals correctly when starting to ride. Here is how I start riding:
- I adjusted the seat so that I can sit on it with the left foot flat on the ground.
- I move the right pedal backwards to be in the lowest position.
- I adjust both pedals with the correct side upward.
- I put the right foot on its pedal with the left foot on the ground.
- I start the bike moving with the throttle.
- As the bike starts moving I put the left foot on its pedal and start pedaling.
- 30 Apr 2013: Bike arrived; assembled it with some difficulty as no instructions for assembly came with it. Took a few short rides and really liked it! Ordered Bushwhacker Moab Black pannier pack from Amazon.
- 1 May 2013: Ordered a Kill-A-Watt meter from Amazon. Took a ~10-miles ride:
- From home through Stroubles-Mill subdivision to Merrimac Road
- Down hills on Merrimac Road to Huckleberry Trail:
- Huckleberry Trail to Virginia-Tech campus
- Across campus to trail to Hethwood
- Across east edge of Hethwood to Stroubles-Mill subdivision trail
- Across north edge of Stroubles-Mill subdivision to home
- Low SOC light was blinking when arriving at home, but there seemed to be plenty of power still.
- 2 May 2013: Ordered an LED tail light from Amazon. Ordered two "Rider Roper email@example.com" bumper stickers from CafePress.
- 3 May 2013: Bushwhacker pannier pack came and it fitted perfectly on the back: Kill-A-Watt meter came.
- 11 May 2013: Ordered LED rear light from Amazon.com.
- 12 May 2013: Learned how to remove the battery. It requires a considerably large force to pull it out backwards after unlocking it by turning the key counterclockwise.
- 3 June 2013: Order a rear-view mirror to attach inside the left handle bar: It folds to be above the handlebar.
- 10 August 2013: Got Garmin Edge 200 computer for bicycle.
- 12 August 2013: Crashed into a hog-wire fence at the east edge of Hethwood and got a few cuts and abrasions on face, left hand and both knees.
- 14 August 2013: Discovered that the left folding pedal was damaged in the crash.
- 15 August 2013: Got used non-folding pedals put on bike by Bike Barn in Blacksburg and ordered MKS FD-7 Folding Platform Pedals from Amazon.com. Bought colored wheel-spoke LED light (Nite Ize SpokeLit) at Bike Barn.