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Electric Mountain Bike 21 Speed Ultimate Edition Zipper Z4 e-bike - 26" Tyres - Black

  • £979.95

The Z4 is our top of the range e-bike featuring front and rear adjustable suspension, folding aluminium frame with patented safety lock and 21 speed Shimano gearbox.

Like the Z6 this is a fully capable mountain bike but this one has the benefit of being able to be folded up for convenient storage and transport. As the frame can be folded it means the lithium battery can be stored inside keeping it safe and dry.

During the week take advantage of the electric power system to nip around at a fraction of the cost of a car or motorbike and then at the weekend hit the trail for some off road fun.

The brushless motor has plenty of power and will push the bike to the UK maximum legal speed of 25KM/H making it totally road legal. The intelligent throttle system makes operation very easy. Just select how much help you want from the electric system using the easy selector, start pedaling and the motor will assist. 

Other features include kick stand, battery life indicator, and rust resistant chain.


Foldable Bicycle

Folds easy transportation and storage
Quick Release Seatpost

Spring loaded for added comfort and smooth ride
Quick Release Front Wheel

Minimising folded space for storage or transit, and for ease of road side repairs
Aluminium Folding Frame

Lithium battery in frame for protection, with patented locking mechanism
Electric Motor

Rear mounted 250W brushless motor
Right handle
Battery LED 
Pedal assist system with level selector and LED battery charge indicator
Left Handlebar
Brake Lever & PAS
Smart brakes which cut power to the motor when applied, making sure you get the most distance out of your battery life, and pedal assist system with level selector,
Wavy Brake Discs
Wavy drilled front & rear brake discs, with front anodized aluminium red hub
Preload & lockout on front suspension
Large 26" Wheels
With off road ready tyres
Rear mounted kickstand for easy parking
Front & rear adjustable mudguards
Aluminium Alloy Frame
Making it lightweight yet durable
Shimano Gear System
21-speed Shimano gears and derailleur
    • Full Online Spare Parts Backup
As with all bicycles, a Zipper e-bike must be used and maintained properly in order to function correctly. Please read the instruction manual carefully before attempting to assemble and use the bike, as it contains vital safety information to ensure the continued performance. If you have any queries, please feel free to contact our customer service department.
 Zipper Bikes
Engine / Motor Size:
Deck Material:
Fuel Type:
Fuel Consumption:
Fuel Tank Capacity:
Max. Range:
 Around 40km depending on weight and motor use.
 36V 9AH Lithium
Charge Time:
Max. Speed:
Max. Power (Kw/Rpm):
Max. Torque (N.M/Rpm):
Front Brakes:
 Front disc brake (160mm disc)
Rear Brakes:
 Rear disc brake (160mm disc)
Front Suspension:
 Aluminum suspension fork. Suspension is lockable and adjustable. 100mm travel.
Rear Suspension:
 Rear pivot suspension
Front Tyres:
 26 Inch
Rear Tyres:
 26 Inch
Starting System:
 21 Speed Shimano gearbox
Wheel Base:
Seat Height:
Ground Clearance:
 of Pedals: 130mm
Net Weight:
Engine Type:
Engine Bore x Stroke:
Compression Ration:
Drive Train:
Recommended Age:
 14+ Years if used without supervision & 120kg max load
Licence Requirements:
 Zipper e-bikes meet the 'Electrically Assisted Pedal Cycles' (EAPCs) requirements and are therefore classed as normal pedal bikes. This means you can ride it on roads, cycle paths and anywhere else pedal bikes are allowed without a license or tax.

Packing Info:

 Around 30 minutes minor assembly required. Download instructions for more information.


Extra Info.:

Electric bike may arrive with slight blemishes or minor scratches from transit. We cannot replace bikes for this reason. Please be aware of this before purchase.

Folded size: 1020mm long x 400mm wide x 900mm high

The battery can be easily removed to lighten the weight.

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