folding ebike

the crescent, folding electric bike


Crescent folding bike is the third electric assist bicycle released by Quantum eBikes. Light, practical and easy to transport, this electric bike will follow you around the world.

Crescent eBike
Crescent Folding Electric Bike

Bosch active line plus motor

Crescent’s Bosch Active Line Plus motor is powerful, reliable and quiet. It accelerates gently and smoothly to achieve a natural riding sensation. It is perfect for urban and suburban terrains, primarily on surface roads and bike paths with moderate inclines. It is also suitable for touring – sporty rides of longer distances.

This motor provides outstanding performance – the intelligent 3-sensor concept of the drive unit captures more than 1,000 measurements per second to ensure a smooth ride. It is incredibly lightweight (only 3.2 kg) and in integrated in the frame of Crescent folding bike for a balanced and stable ride.  

400w battery & purion display

The 400 W battery allows 75 km average range, perfect for the daily city commutes or nice weekend rides. The light lithium-ion battery is easy to install or remove, and can simply be charged using the charging socket on the side of the folding bike. The 500 W battery option is available for those who would like to take their rides even further. A single fully-charged 500 W battery has an average autonomy range of 100 km.

Crescent is equipped with Bosch Purion display – the compact on-board computer. It provides a clear overview of the charging status, speed, riding mode, range, trip distance and total distance. This control unit allows you to keep your hands on handlebars at all times. 

Crescent folding electric bike


The 6061 aluminium frame is incredibly lightweight, allowing a rider to easily lift and carry the folding bike with them. The sporty design of the frame allows for comfortable and long rides.

Tektro hydraulic disc brakes have reliable and safe stopping power, even at high-speeds and any weather conditions. The handlebars come with ergonomic grips for greater palm support. 

The height of the stem and the seat, as well as the angle of the handlebars, can be adjusted according to the rider’s height. Rear rack, fenders, and kickstand are included as standard equipment.

folding crescent

The Crescent can be folded into a compact and portable size, that can easily be carried around or stored away. Incorporated in the frame and fork are magnets to hold the bike together when folded and being handled. 

It takes less than 10 seconds and 4 steps to fold the bike, with no tools needed! The frame has an integrated handle that allows you to easily carry it, folded or not!

Crescent folding electric bike


Weight: 20kg (45lbs)
Folded Size: 94cm x 68.5cm x 53cm (37” x 27” x 21”)
Folding Time: 10 seconds
Suggested Rider Height: 4ft11 to 6ft1 (150cm to 186cm)
Max Rider Weight: 240 pounds (109kg)


Frame: 6061 Alloy Frame
Fork: Rigid Steel Fork


Handlebar: Alloy Handlebar
Grips: Velo ergonomic
Saddle: Velo Black Satin, steel rail
Seatpost: Alloy Seat post w/ micro adjustment, 30.44mm diameter
Seatpost Clamp: Extruded Alloy seat clamp, cold forged quick release lever


Brakes: Tektro hydraulic disc
Brake Levers: Tektro


Wheel Size: 20″ wheels
Tires: Kenda (Black) w/reflective band, 2.3 inches, puncture resistant (K-Shield)
Front and Rear Wheels: Disc-specific, double wall, alloy, 36 holes


Shifter(s): 8 speed
Rear Derailleur: Shimano Altus
Chain: KMC Z-Chain 8 speed
Pedals: Folding pedals
Shifter Cable & Housing: Shimano SIS


Motor: Bosch Active Line Plus, 36 V/250 W, max speed 25kph (EU); max speed 20mph (US), max speed 32kph Canada. Torque 50 Nm.
Battery: Bosch PowerPack 400 Wh. (optional 500 Wh)
Display: Bosch Purion, 4 levels of assistance, walk assist
Range: 400 Wh: 50-100 km (31-62 mi)


Bell: Included
Kickstand: Alloy, height-adjustable
Front Light: Smart eBike headlight
Rear Light: Smart DC 6-60V for eBike
Fenders: Lightweight black plastic
Rack: Aluminum alloy rack (Max. load 27kg)