G4, the universal cargo bike

The G4 possesses all of the assets to become your favourite vehicle and is a true alternative to a car.

A generous and versatile compartment

The G4 has a large storage area of 270 litres which can be locked to effectively secure its contents. Thanks to the innovative lid and the partial opening, there is no need to choose between transporting the children and having a completely closed compartment: both are possible in one trip.

Transport everything

The compartment gives you an advantage of over 270 litres. The G4e was designed to make your daily life easier.

The pure design gives the bike dynamic lines and sleek curves,  trailblazing the next trend in terms of passive safety.

Constructed around two main shells, it is formed with a recyclable anti-lock braking system. One aluminium structure situated inside gives it rigidity, effectively protecting the children in case of a fall.

The G4 has a large storage area of 270 litres which can be locked to effectively secure its contents. Thanks to the innovative lid and the partial opening, there is no need to choose between transporting the children and having a completely closed compartment: both are possible in one trip. The key allows the contents to be securely locked.

The G4 compartment comes with a soft waterproof cover.

DOUZE Cycles Universal box + soft cover
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For the comfort and security of your children:

The seat is equipped with two 3 point seat-belts which are adjustable; the buckle is easy to secure thanks to two magnets. Only an adult could open the system. The seat can be adjusted into six different heights, allowing for their ultimate comfort and security, whatever their age.

A large stand prevents the cargo bike from falling over and small step makes it easier for even young children to climb inside the compartment.

One can access the battery simply by tipping the seat over.

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DOUZE Cycles - Child seat
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Motorisation premium & grande autonomie

German Quality

The large industrial company Brose has been developing electric motors for bikes for many years. Today it is a major player in this sector and their motor BROSE DRIVE was created out of rigorous development of precision equipment. One of the principal qualities it offers is one of the most advanced couples on the market,  a criterion which is very important for cargo bikes.

The motor is very quiet, thanks to the carbon drive belt, delivering powerful assistance in proportion to the effort of the cyclist, up to 25 km/h and without resistance. A new firmware was developed especially for the G4 for the use of cargo bikes.


The compact design of the BROSE motor allows optimal integration on the frame and significant weight gain. The motor is assembled entirely in the BROSE factories in Berlin, proudly stamped MADE IN GERMANY.

The battery uses the new technology Li-ion Graphene for an increased energy capacity. The G4 is made to house an extra battery allowing it to reach a total capacity of 1270 watts. (2 X 635 Wh). This equipment makes the G4 the cargo-bike the most autonomy on the market.

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The motor

Brushless motor 36V
Nominal power 250W
Maximum torque 90 Nm
Sensors : torque, speed
Thermal and electrical protection
Primary reduction by composite belt
Weight : 3.4 kg

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BLOKS Display

Compact Display
4 levels of assistance
Buttons to toggle assistance + / –
On/Off lights
Battery level indicator
Gilded, high contrast display
Blue backlight
Micro USB connection

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Battery

36V / 17.5 Ah / 635Wh
18650 Li-ion Graphène cells
Protection indicator : IP64
Capacity control : 4 LED
Locking system : by key
RoPD connector (magnetic)
5A charger

Secure and comfortable steering

2*2 cable steering

The Douze G4 benefits from the exclusive system of cable steering created by DOUZE Cycles in 2012. This technology is proven to increase the handling even in tight spaces, and allows it to feel as if you were riding a traditional bike.

This exclusive system of cable steering offers exceptional manouverability!

The angle of rotation of the fork rotates up to  75º to the right and left. At a low speed, you an manoeuvre freely and do a u-turn in tight spaces. However, the steering stays tight and strong when the speed accelerates. The symmetry maintains the course in case of intense braking. Compared to a classic steering system, the handling of DOUZE are simple and intuitive.

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Suspension fork

No matter where they go, the new suspension fork offers great riding comfort, cushioning and unmatched handling for more safety. It is specially sized for the use on a cargo bike, and integrates the pulley of our cable steering. Experienced riders will appreciate that it is adjustable and lockable if necessary.

EFFICIENT EQUIPEMENT

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Brakes

The hydraulic disc brakes are a must-have on a cargo-bike. The Tektro GEMINI offers you progressive and powerful braking.

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Gear

Depending on your needs and the terrain where you will take your DOUZE, we propose to you different transmission solutions. The SRAM 9 speeds derailleur is originally installed on the G4e with a Gearsensor, that is very simple to use. We also offer the possibility to install a NuVinci N380 hub for an easiest and smoothest shifting.

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Safety

The anti-theft chain BY AXA will secure your G4 effectively. The casing is nylon to protect the painting of your frame from scratches and  damage.

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Visibility

The from and rear lights are always available to be seen in any circumstances. The lights are connected to the battery and can be turned on with the RC3 controller.

TECHNICAL ELEMENTS

FRAME AND FORK

Frame
TRAVELLER / MESSENGER Alu 7005
Colour
Matte black / powder coated
Fork
Reenforced suspension – clearance 80mm – Axle QR 9 mm

WHEELS, BRAKES AND STEERING

Rear hub
135 mm – 36H – Axe 10 mm – Black
Front hub
100 mm – 36H – Axe QR 9 mm
Rims
20″ X 2.125+ 26″ X 2.125- 36H – Alu Double walled, black
Tyres
SCHWALBE BIG BEN 2.15
Brakes
TEKTRO TKD65 AV-AR hydraulic – Disc 180 mm
Mudguard
Acier 70 mm- powder coated
Rear wheel
26″ + Disc brakes
Steering system
2*2 cables
HeadsetAV/AR
1″ 1/8 Semi integrated
COMPONENTS
Hanger
MESSENGER : Sport – TRAVELLER : Moustache
Stem
60mm – D1: 28.6 – D2: 31.8
Handles
Ergonomique
Saddle
MESSENGER : Sport – TRAVELLER : Confort
Seatpost
400mm (H.sol 82-115cm)
Seatpost pin
Fixed
Pedals
Standard black aluminum
TRANSMISSION
Transmission
 SRAM XSerie 9 speed exterior derailleur (11-36)
Chain
TAYA E-NOVE 1/2″ x 5/64″
LIGHTING
Front
B&M Lumotec EYC – 50 Lux
Rear
B&M Secula plus
SÉCURITÉ

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If you have any questions or need help configuring your DOUZE, we’re here for you.

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