JR-1 28” City Electric Bike

JR-1 28” City Electric Bike

Electric systemMain component
Model NO.JR1FrameAluminum 28″
Battery36Vx10.4AH,SAMSUNG batteryRimAluminum Double Wall Rim
SensorTorque sensorFront ForkZOOM integrated suspension fork
Controller8FUNFront brakeOil-pressure disc brakes
ThrottleNILRear Brake
Display8FUN LCDSpokesStainless
PerformanceSpeed GearsShimano 10 speed
SL-M610-R Shifter+ RD-M610
Speed25km/h (16 mph)Derailleur
Range60km (38 miles)Handle BarAlloy
Max Load120Kg (264 lbs)Seat postAlloy
Weight25 Kg (55 lbs)StemAlloy
Carton size149*24*79 cmBrake LevelF&R disc brake
Loading Qty68PCS/20GP/ 150PCS/40HQChainAntirust
Delivery45-60 DaysChain wheelAlloy


  • A unique combination of 28 mph top speed, off-road capability and stealthy frame design with quiet motor operation that’s suited to both urban and trail environments
  • Available in a four frame and wheel combinations! choose from high-step or step-thru design then either 28″ wheels or smaller 26″ wheels that lower the frame
  • Lots of color choices make it fun, integrated headlight improves safety, rack bosses allow it to transform into a commuter bike, upgraded 180 mm hydraulic disc brakes
  • The fenders can rattle a lot so I’d recommend taking them off for trail or mountain riding, the battery isn’t as easy or fast to take off as some other bikes, no bottle cages


  • By double tapping the “i” button you can enter the display settings and change the top speed (by entering the unlock code that kocass provides) and this lets you hit up to 28 mph top speeds as a Class 3 or dial it down as low as you want, at 20 mph it’s Class 1 and can be used on more mountain bike trails
  • Without removing the fenders, you get a solid urban bike that could transform into a commuter if you just add a rear rack using the threaded eyelets (just get a disc-brake ready rack like this)
  • This model has included an integrated LED headlight here that runs off the main battery pack and wasn’t so big or intrusive that I felt it had to come off when riding on trails, it didn’t rattle or feel flimsy
  • I love that you can get the frame in diamond (stiffer, stronger) or step-thru (much easier to mount and stand over) frame styles AND that you can choose from 28″ or 26″ wheels because that makes the bike approachable for a wide range of riders, specifically petite riders like my girlfriend who loved the step-thru
  • Good choice on the tires, they were wide and grippy enough to handle the trail but rolled fairly smoothly on pavement, I also appreciated the upgraded thicker 13 gauge spokes for rugged terrain or heavier loads
  • Very nice drivetrain here for a value priced ebike, you get an 10 speed Shimano Alivio with trigger shifters vs. the large wonky thumb shifter on some other bikes
  • Decent suspension fork with preload and lockout adjustment, makes it suitable to trails or city riding and I like that they sort of match the frame color depending on which one you get
  • Both wheels have quick release skewers making it much easier to change flats or transport the bike if you don’t have a rack (like if you’re carrying it in your car’s trunk) without needing tools, this is one of the potential big benefits of mid-drive ebikes
  • The motor is compact, good looking and VERY quiet… possibly one of the quietest mid-drive motors I have tested to date, this is great when riding on trails in nature
  • Impressive saddle, it felt comfortable but also active… many of the other accessories were slightly upgraded as well including the handle bar, seat tube and even the stem (which is an adjustable angle option on some models)
  • Given that this bike is capable of high speeds or going off-road I like that it has suspension and the bigger tires but might also consider a seat post suspension like the Thudbuster ST, just make sure it’s a 27.2 mm diameter to fit correctly and note that it will raise the minimum seat post height… and that the post is already a little high on the step-thru models
  • Not all models do this but I was impressed with how well the white frame matched the rims, seat post, bars and stem… also the Alex Rims are a good upgrade for strength and durability
  • Oil disc brakes with full sized 180 mm rotors! This is an important upgrade that helps the make the bike trail worthy, they are easier to use, stronger and smoother than mechanical
  • The motor offers 80 Newton meters of torque which had no problem taking me up a steeper section of trail, you have to pedal since there’s no throttle but it worked great and truly impressed me given this was the first Bafang Max Drive electric bicycle I had tried
  • Very high quality Samsung/Chinese/Panasonic battery cells that should last a long time, the pack sizes are great at 36/48 volts 10.5 or 11 amp hours (depending on the step-thru or high-step frame) and you get a solid 1 year comprehensive warranty to back it all up
  • I love that the display panel shows 10 ticks on the battery level indicator! that’s much better for communicating than a lot of ebikes which only have 4 or 5 tick

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