We have read all expert and user reviews on the Jupiter Bike Discovery X7. In summary, this is what cyclists think. Published Jul 25, 2025 by Amar Punekar.

8 reasons to buy

Testers appreciate the comfortable ride over broken pavement and potholes.
At 36” x 17” x 25” when folded, the Discovery X7 is relatively compact for a folder with 20” wheels.
A 5’9” tester enjoys the comfortable upright riding position.
The 48lb Discovery X7 is relatively lightweight for a 20" e-folder at this price point.
A tester finds it easy to pedal the bike without motor assistance.
The bike comes almost fully assembled, with only the handlebars left to install.
Reviewers say the magnesium frame looks sleek and premium.
The choice of mag wheels eliminates the possibility of broken spokes.

7 reasons not to buy

A tester reports a delay of one and a half revolutions before pedal assist kicks in.
The 16mph top speed doesn't take advantage of 20mph Class 2 e-bike limit in the US.
An expert says that, despite the roller wheel, the bike doesn’t roll when folded, and it tends to tip over.
The Discovery X7 doesn't come with a taillight and the tires lack puncture protection.
A tester finds the battery rattles noisily when riding over bumpy terrain.
The battery level readout is inaccurate, according to a reviewer.
Jupiter Bike doesn’t provide a recommended rider height range for the one-size Discovery X7.

Bottom line

The Jupiter Bike Discovery X7 is a folding e-bike with 20” wheels, a 350W motor, and a 244.8Wh battery. The bike’s relatively low weight and compact folding size make it a decent option for lifting and transportation. Reviewers appreciate the upright riding position, easy assembly, and comfortable ride over rough pavement. Downsides include lagging pedal assist, weak climbing ability, a rattling battery, and poor stability when folded. Reviewers also complain about the inaccurate battery readout and the lack of a taillight. Overall, experts feel the Discovery X7 offers good value as an entry-level e-folder for urban rides.