JupiterBike Discovery Review

Jupiterbike Discovery Electric Bike Review
Jupiterbike Discovery
Jupiterbike Discovery Hub Motor Cast Rims
Jupiterbike Discovery Main Folding Tube
Jupiterbike Discovery Cockpit View
Jupiterbike Discovery Display Controls
Jupiterbike Discovery Front Angle View
Jupiterbike Discovery Rear Suspension Fender
Jupiterbike Discovery Single Speed System
Jupiterbike Discovery 36v Battery Pack
Jupiterbike Discovery 2amp Battery Charger
Jupiterbike Discovery Portable Battery Charger
Jupiterbike Discovery Stock Folding White
Jupiterbike Discovery Electric Bike Review
Jupiterbike Discovery
Jupiterbike Discovery Hub Motor Cast Rims
Jupiterbike Discovery Main Folding Tube
Jupiterbike Discovery Cockpit View
Jupiterbike Discovery Display Controls
Jupiterbike Discovery Front Angle View
Jupiterbike Discovery Rear Suspension Fender
Jupiterbike Discovery Single Speed System
Jupiterbike Discovery 36v Battery Pack
Jupiterbike Discovery 2amp Battery Charger
Jupiterbike Discovery Portable Battery Charger
Jupiterbike Discovery Stock Folding White

Summary

  • A futuristic, small, compact, and lightweight folding ebike with rear suspension, fenders, cast rims, and is said to be approved by the FAA to travel by plane
  • A lot of comfort and features like comfort gel saddle, rear suspension, ergonomic grips, electric horn, battery integrated lights in the front and rear, and a magnet and roller wheel to keep the bike folded and easily transported
  • 250 watt hub drive, great power and mechanical advantage for a bike this size, reliable single speed drivetrain, 160mm mechanical disc brakes with motor inhibitors
  • Single speed with a cadence sensor means more pedal actuation to get going, small battery, wheel base, and top speed may not be for everyone, and the rear light is easily blocked

Video Review

Trusted Advertisers

Introduction

Make:

JupiterBike

Model:

Discovery

Price:

$1,295

Body Position:

Upright

Suggested Use:

Commuting, Travel, Urban

Electric Bike Class:

Pedal Assist (Class 1), Throttle on Demand (Class 2)
Learn more about Ebike classes

Warranty:

90 Days

Availability:

United States

Model Year:

2019

Bicycle Details

Total Weight:

42 lbs (19.05 kg)

Battery Weight:

2.9 lbs (1.31 kg)

Frame Material:

Aluminum Alloy

Frame Sizes:

13 in (33.02 cm)

Geometry Measurements:

Un-folded: 13" Seat Tube, 21.25" Reach, 20" Stand Over Height, 32.5" Minimum Saddle Height, 22.75" Width, 51.5" Length (Folded: 30.5" Width, 17" Length, 21" Height)

Frame Types:

Step-Thru

Frame Colors:

Gloss White with Black Accents (All Black, Orange Available)

Frame Fork Details:

Aluminium Alloy 100mm Hub spacing, 14mm Bolts

Frame Rear Details:

135mm Hub Spacing, 12mm Keyed Threaded Axle with 18mm Nuts

Attachment Points:

Front and Rear Fender Bosses

Gearing Details:

1 Single Speed 11 Tooth Sprocket

Shifter Details:

Shimano Thumb Shifters on Left and Righ

Cranks:

Forged Aluminum Alloy Arms, 170mm Length, Square Taper Bottom Bracket Spindle, 48 Tooth Steel Chainring with Guard

Pedals:

Folding, Plastic Pedals

Headset:

Threadless, Sealed Cartridge Bearings, Straight 1-1/8"

Stem:

Folding, 420mm Rise with 6mm Alignment Hex Bolt

Handlebar:

Aluminum Alloy, 580mm Width, 5º Backsweep

Brake Details:

Core Ride Mechanic Disc with 160mm Rotors, Four-Finger Levers with Motor Inhibitors

Grips:

Friction Mounted Rubber, Ergonomic Edge

Saddle:

Fabric Covered, Comfort Saddle with Center Cut-out, Rear Springs and Built-in Rear Light

Seat Post:

Aluminum, with Retention Nut and Quick Release Collar

Seat Post Length:

350 mm

Seat Post Diameter:

31.6 mm

Rims:

Cast Magnesium, 35.5mm Outer Width, Black

Spokes:

6 Cast Supports

Tire Brand:

Cheng Shin, 16" x 1.95" (54-305)

Wheel Sizes:

16 in (40.64cm)

Tire Details:

40 to 65 PSI, 2.8 to 4.5 BAR with Reflective Sidewalls

Tube Details:

Schrader Valve

Accessories:

Front and Rear Plastic Fenders, Integrated LED Headlight, Rear Mount Kickstand (40mm Mount), Water Resistant Carrying Case, Chain Guard Roller Wheel

Other:

Locking Removable Downtube Mounted Battery Pack, 1.4lb 2 Amp Charger, 265lb Max Load

Electronic Details

Motor Type:

Rear-Mounted Geared Hub
Learn more about Ebike motors

Motor Nominal Output:

250 watts

Battery Brand:

Generic Unbranded

Battery Voltage:

36 volts

Battery Amp Hours:

5.2 ah

Battery Watt Hours:

187 wh

Battery Chemistry:

Lithium-ion

Charge Time:

2.5 hours

Estimated Min Range:

8 miles (13 km)

Estimated Max Range:

30 miles (48 km)

Display Type:

Fixed, LED Display, Buttons: -, M, +, Front Light Hold +

Readouts:

Power Level (Percentage) Pedal Assist Level (1-3), Trip, Odometer, Ride Timer,

Display Accessories:

Half-Grip Twist Throttle on Right

Drive Mode:

Cadence Sensing Pedal Assist, Twist Throttle (Sealed Sensor)

Top Speed:

16 mph (26 kph)

Trusted Advertisers



Written Review

To run the forums, host the website, and travel, I charge a universal service fee for my reviews. This review was sponsored by JupiterBike. My goal is to be transparent and unbiased, this video and written review are not meant to be an endorsement of JupiterBike products.

Compact is the first thing that comes to mind when looking at the small JupiterBike Discovery. This bike is purpose built, an almost perfect last mile companion to cart around or even just to have fun with on the weekend. The Discovery is a mini folding ebike that comes in 3 colors, 1 small frame size, and a cool aesthetic to emphasis the slim and lightweight 42lb design. You may notice the shorter wheel base and 16” wheels. This, without a doubt, is to keep the bike trim for folding and carrying around. Those tires are a 16” x 1.9” and offer reflective sidewalls and feature a cast magnesium wheel. The wheels are accented nicely with these stylish plastic fenders… these help keep you dry and it looks like they are not full length, but that is a convenience for folding. Speaking of folding convenience, there are 2 magnetic plates on the front and back to keep the bike more securely folded when moving it around, and there is a little roller on the bottom of the frame to better maneuver it when walking it around if you would rather not carry it. Surprisingly, there is quite a bit of comfort in this small package. You get ergonomic grips, a comfort gel saddle (one of my favorite parts), and even a rear suspension. This rear suspension has a really unique design to it… not a ton of travel, but then again this isn’t meant for mountain biking. It is still pretty comfortable and serves its purpose well running around on paved environments. I love the battery integrated lights here. The front headlight points where you steer, and the rear is designed under the seat. That seat light has an independent button to turn it on and off, so don’t forget to turn it off like I did or you will drain the battery. I should also mention it is near the seat enough that if you were wearing a jacket or backpack, it could potentially cover that rear light. Other features include a kickstand mounted in the rear to eliminate annoying pedal lock, plastic folding pedals, and a loud electric horn.

Driving the bike is a 250 watt rear hub motor. This motor is cast into the rims and while it may seem small, it has great power for a bike of this size. It offers 1-3 levels of pedal assist via the sealed cadence sensor and it moves pretty well given the mechanical advantage you have with the smaller wheel size. You won’t be flying by at Mach 1 however, the top speed is limited to 16mph, which is understandable as any faster would feel unstable on such a small machine. Still, you are plugging away much faster than a regular bicycle. There is a throttle here too, this is tied to the pedal assist, so the top speed will be dictated by which level you are in, 1-3. Mechanically, you have normal sized 170mm crank arms, so the pedaling rotation feels nice and natural compared to other small bikes or trikes that feel more like tip-toe-ing when you pedal. It is a single speed 11 tooth sprocket with a 48 tooth front chain ring. Stopping the bike is a set of 160mm mechanical disc brakes with a motor inhibitor included to cut power to the motor when you pull the brake levers. Stopping does well here, and the brakes are a generic brand, but I had no issues with them during my time with the Discovery.

Powering the bike is a 36v 5.2ah lithium-ion battery pack. The pack is mounted in the frame near the main folding tube. Simply remove the main latch and being to fold the frame in half to access the battery for taking it in and out. 5.2ah may not be the largest range… I suspect a charge would take you somewhere around 14 miles or so, but the small amp hour rating was done for a reason. The 5.2ah rating meets federal regulations with the FAA so you can take the battery with you when you fly! This is nice since as a last mile vehicle, it stows away nicely, so it really makes the ultimate travel companion. To really care for this and other lithium-ion packs, I have heard that storing in a cool dry location vs. extreme heat or cold will extend the life, and try to keep it about 50% full when not using for long periods so you won’t stress the cells. Try not to let it run down to zero, because that’s really hard on the cell chemistry.

The display here is a compact little grayscale display. While the display may not be removable, it does have a backlight to make it easier to read. To power it on, press and hold the M button. Once the display is on, you will see a battery infographic at the top along with a battery percentage. I love that it shows this since it takes the guess work out of how much battery you have exactly left when there is only 1 bar on an infographic. Pressing the M button will scroll through trip-set, odometer, and a timer. The speed is shown in MPH and the + and – buttons will raise or lower that pedal assist level.

Wrapping up, I found that the JupiterBike Discovery was a great little ride and I love that it meets FAA regulations to make it a perfect travel companion. There are some tradeoffs though. I found that the single speed mixed with the cadence based pedal assist means you have to pump it a little more for the electric system to kick in and get going. Luckily, there is a throttle here, so you can use that to get you going if pedaling is difficult. Also, the bike is small in a lot of ways which can be a bit of a negative. Small battery, small drivetrain, small wheel base… but at least all of this somewhat serves a purpose to keep it compact and portable. As mentioned before, the bike has a purpose, and if it fits your needs, this could be a great setup. Thrown in the smaller price too of $1,295 and you have your self a value bike that could check off your boxes. I want to thank JupiterBikes for sending me the Discovery to review and I look forward to future offerings.

As always, I welcome questions and feedback in the comment section below. Whether you own a previous version of the bike, have taken a test ride, or are brand new to the space, my goal is to provide an objective and honest resource. You can also join the JupiterBike ebike forums and share your own photos, videos, and review updates to help others! Have fun out there, and ride safe :)

Pros:

  • A stylish, small, compact, and lightweight folding ebike with rear suspension, fenders, cast rims, and is approved by the FAA to travel by plane
  • Quite a bit of comfort in this small package, you get ergonomic grips, a comfort gel saddle (one of my favorite parts), and even a rear suspension
  • This rear suspension has a really unique design to it, pretty comfortable and serves its purpose well running around on paved environments
  • The tires are 16” x 1.9” and offer reflective sidewalls, feature a cast magnesium wheel, and have a great mechanical advantage to get the motor going, pedals, and brakes as well
  • Stylish plastic fenders that help keep you dry and while like they are not full length, the shorter length makes it a convenience for folding
  • I love the battery integrated lights here. The front headlight points where you steer, and the rear is designed under the seat
  • A 250 watt rear hub motor, this motor is cast into the rims and while it may seem small, it has great power for a bike of this size, it offers 1-3 levels of pedal assist via the sealed cadence sensor and it moves pretty well given the mechanical advantage you have with the smaller wheel size, there is a throttle here too, perfect if you don’t want to pedal
  • Normal sized 170mm crank arms, so the pedaling rotation feels nice and natural compared to other small bikes or trikes that feel more like tip-toe-ing when you pedal
  • 160mm mechanical disc brakes with a motor inhibitor included to cut power to the motor when you pull the brake levers, the brakes are a generic brand, but I had no issues with them
  • 36v 5.2ah battery charges quickly and that small amp hour rating was done for a reason, the 5.2ah rating meets federal regulations with the FAA so you can take the battery with you when you fly! This is nice since as a last mile vehicle, it stows away nicely, so it really makes the ultimate travel companion
  • For folding convenience, there are 2 magnetic plates on the front and back to keep the bike more securely folded when moving it around, and there is a little roller on the bottom of the frame to better maneuver it when walking it around if you would rather not carry it

Cons:

  • I found that the single speed mixed with the cadence based pedal assist means you have to pump it a little more for the electric system to kick in and get going, luckily, there is a throttle here, so you can use that to get you going if pedaling is difficult
  • The bike is small in a lot of ways which can be a bit of a negative, small battery, small drivetrain, small wheel base… but at least all of this somewhat serves a purpose to keep it compact and portable
  • The battery integrated rear light has an independent button to turn it on and off, so don’t forget to turn it off like I did or you will drain the battery, also it is positioned under the seat enough that if you were wearing a jacket or backpack, it could potentially cover that rear light
  • The top speed is 16mph which is not fast for ebikes, but I understand why it was chosen here, any faster could be dangerous on the smaller wheel base, it still is faster than a regular bicycle and works well

Resources:

Comments (10) YouTube Comments

Doug
2 months ago

Something close to this would be ideal for boaters. Folding bikes for boats have been around for years. But it is uphill usually from where you park your boat to anywhere, so they don’t get used like they might if they were ebike.

  Reply
Court
2 months ago

Hi Doug! I agree, this little folder is pretty unique and would be great for boaters and RV travelers :)

  Reply
Tay
2 months ago

This is the same bike as Swagtron EB7 and Jetson’s Metro folding bike.
They are all based on the same manufacturer from Onebot’s S6 in China.

Jetson has it fist in the state so I bought one from them around $800 USD. but then after a year, I ran into some problem with the bike; however, Jetson has since discontinued the product. so I contacted Swagtron for a replacement part and fixed my issue. To be honest, since they are all the same bike. I would purchase it from Swagtron at a cheaper price point and purchase the fenders kit from Jupiter bike as an accessories.

  Reply
Court
2 months ago

Hi Tay! Great tips… thank you so much for sharing this with us. I’m glad you were able to find parts that worked from these other manufacturers and your knowledge and insights are right on ;) I hope it continues working well for you!

  Reply
Dewey
3 weeks ago

No, the battery is not approved for airline travel, needs to be <100wh

  Reply
Court
3 weeks ago

Thanks for the feedback on this, Dewey! I was wondering about the battery situation here but was not the one who covered this bike. The rules have changed over the years and perhaps there are even some differences between regions of the world or airlines. I appreciate your feedback, and welcome you to share further if you know more details.

  Reply
Dewey
3 weeks ago

difficult to justify the price when the Swagtron Eb7 is the same bike with a more powerful 350w motor and larger 6.4ah battery for $300 less. Here’s an article about it on Electrek.

  Reply
Court
3 weeks ago

Thanks for highlighting an alternative here, Dewey :)

  Reply
HellyK
1 week ago

I purchased this bike directly from the vendor. It was very easy to assemble. It looks sleek and seems sturdy. I like that it includes led lights and one on the seating. I’m 5’2 and I had to remove the stopper on the seating because even at the lowest adjustment, my feet just barely touched the ground when at a complete stop. I will have to probably saw off a couple inches.

I’ve had this bike for less than a week and ridden it 3 times. My rear brake stopped working and the bike started squeaking! When I’m spending almost a thousand dollars on something, I expect it to work seamlessly. I contacted the vendor and no response. Unacceptable! Do yourself a favor and buy a different bike for 400 – 500 dollars less. My previous bike was 300 dollars and I had no issues with it!

  Reply
Court
1 week ago

Aww, man! That’s a bummer about the brake. Sorry to hear it… Thanks for sharing your feedback about how easy it was to assemble and how you liked the lights. I agree that cutting the seat post just a bit to get it lower could be a great solution for you to feel comfortable and ride safer. I hope you’re able to find some help or parts to get the rear brake fixed. So sorry that JupiterBike hasn’t responded to you yet. If you really struggle after a week and nobody has replied, I can try to connect you with them directly, just comment here again and I’ll email you.

  Reply

Post a Comment

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.