JR-2 29″ Mountain Electric Bike

JR-2 29″ Mountain Electric Bike

Electric systemMain component
Model NO.JR2FrameAluminum 29″
Motor8FUN rear, 36Vx 250WTyresKENDA
Battery36Vx10.4AH, AERO Wing batteryRimAluminum Double Wall Rim
SensorPasFront ForkZOOM integrated suspension fork
Controller36 VFront brake Disc brakes
ThrottleNILRear Brake
Display9 STEP LCDSpokesStainless
PerformanceSpeed GearsShimano 10 speed
SL-M610-R Shifter+ RD-M610
Speed25km/h (16 mph)Derailleur
Range60km  (38 miles)Handle BarAlloy
Max Load120KGS (264 lbs)Seat postAlloy
Weight25Kg (55 lbs)StemAlloy
Carton size149*24*79 cmBrake LevelF&R tektro brake level
Loading Qty68PCS/20GP/ 150PCS/40HQChainAntirust
Delivery45-60 DaysChain wheelAlloy

 

Summary:

  • A sturdy high-step commuter style electric bike offering up to 20/28 mph pedal assist and 15 mph throttle on demand, uses the same 250/500 watt motor and 36/48 volt battery
  • Mid-level eight speed drivetrain with Shimano Acera derailleur, metal guard protects the derailleur and motor cable in the back and an alloy chainring protector keeps your pants clean along with sturdy alloy fenders
  • An integrated headlight and stand-alone rear light keep you visible but have to be activated independently, large reflective tires from Kenda/Schwalbe are e-bike specific, providing increased air volume for comfort and a puncture protection layer
  • Tool-free adjustable angle stem, ergonomic grips, basic spring suspension fork and suspension seat post make the ride more comfortable, large hydraulic disc brakes with adjustable levers are powerful and easy to use which is important given the heavier 59 lb curb weight

Pros:

  • The hub motor offers a lot of torque and zip for climbing that makes this urban ebike feel more powerful than many others in the space
  • Great overall aesthetic, the black frame blends perfectly with the black motor, battery box, fork, stem, handlebar, cranks, pedals etc. and allows the cables and wires to disappear a bit, I like the matching faux leather grips and saddle too
  • Comfort is an important consideration when riding electric bikes because they tend to take you further and keep you at higher overall speeds, so I love that this model has a suspension fork, suspension seat post, tool-free adjustable angle stem, gel saddle, and ergonomic grips!
  • The drivetrain on this electric bike is well protected, notice the aluminum alloy bash guard on the chainring (which will help keep your pants clean and snag-free) and the derailleur guard at the back (which protects the derailleur and motor power cable), I feel that a full chain guide would have prevented chain drops… but overall this is pretty good
  • Safety is a very important issue to me, especially on a black bicycle that is designed for urban use, so I love that you get a headlight and back light as well as reflective tires and a bell with this model
  • The battery pack and front wheel are easy to take off, which could help reduce weight for transport and make maintenance easier, unfortunately the display panel is not removable and could take more weather wear and scratching at the bike rack
  • Long aluminum alloy fenders with mud flaps will keep you relatively dry and clean, I appreciate the larger alloy pedals here which will reduce slipping and allow for better contact and power transfer
  • Two drive modes to work with here, you can pedal along with cadence sensing pedal assist that doesn’t require force to activate or take a rest and use the trigger throttle which overrides any level of assist for instant power, it’s a good setup for people who need help starting or want to focus on balance and ride around more like a scooter
  • This frame is bit taller, longer, and stiffer than the regular ebikes which offers a step-thru geometry, it’s nice that the high-step this model still offers an angled top tube to reduce stand-over height, the high-step diamond design is going to be more rigid (reducing frame flex with a fully loaded rack)
  • Wider range of gears with an 10-speed cassette and upgraded Shimano Acera derailleur, it’s going to provide more comfortable pedaling options than a 7/8-speed and hold up better between tuneups
  • I feel that the pricepoint on this electric bicycle is very good considering the powerful motor, high capacity 36/48 volt battery and large 180 mm hydraulic disc brakes with adjustable-reach levers and motor inhibitors
  • The cadence sensor on this e-bike is very compact and well protected, it seems more sealed than the older discs with visible magnetic dots and might hold up better in dusty, wet, or muddy conditions
  • This bike can be setup as a Class 3 speed pedelec with maximum assisted speeds of close to 28 miles per hour! That’s a nice option for people who commute and want to save time, the throttle always tops out around 20 mph and I believe that pedal assist can also be lowered to 20 mph if you want
  • The 700c (28-inch) wheel size is more efficient, provides rolling momentum and a lower attack angle, and allows for increased air volume, the Kenda/Schwalbe Marathon tires are e-bike specific and provide better puncture protection than generic tires
  • The battery has a standard USB Type A port near the top right corner which can power your phone or other portable electronics on or off the bike, if you use this while riding, be careful with any wires that are plugged in so they don’t get caught and bent, consider a right angle USB adapter like this

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