Rating:
99% of 100
Special Price £899.99 Regular Price £969.99
SKU
ZIPPER-Z4B

Brand new version with LCD control panel for greater setup control and information, bigger 10AH battery for longer range and new water resistant wiring.
The Z4 is a top of the range electric MTB featuring front and rear adjustable suspension, easy folding aluminium frame with patented safety lock and 21 speed Shimano gearbox. This is a fully capable mountain bike with the benefit of being able to be folded up for convenient storage and transport. As the frame can be folded it allows the lithium battery to 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 250W brushless motor has plenty of power and will push the bike to the maximum legal speed of 25KM/H making it totally road legal. Just select how much help you want from the electric system using the easy selector, start pealing and the motor will assist.
Other features include walk assist with finger throttle, digital control panel, kick stand, battery life indicator, bright front and rear LED lights, battery lock and rust resistant chain.

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Customer Reviews

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  1. Review by Andy

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    Excellent bike
    This is my first electric bike ordered from nitrotek only took a week from order to delivery quite easy to assemble although handlebars were quite difficult bike is very fast and easy to use assistance makes hills very easy would recommend this to anyone excellent service from nitrotek
  2. Review by Joseph

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    Price
    My previous review left a minimum rating for the price. This was an error. I intended to give it full marks, but the computer imps intervened and changed my rating! Excellent bike that I would highly recommend.
  3. Review by Joseph

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    Z4 review.
    I used my Z4 on a daily basis for over three years before the battery died.
    I live half way up a hill which means leaving or arriving I have to climb a very steep hill. My Z4 handled this task with ease.
    However, 25kg is a little too heavy to manoeuvre if one was to use this folded to allow you to take it on the underground or overground railway legally.
    Overall, my verdict is positive. My Z4 always prompted conversation with complete strangers with polite and interested enquiries. No mean feat in London.
    Waiting on delivery of my Z6. This purchase was based solely on my experience living with it’s cousin. I look forward to it entertaining me to the same degree.
  4. Review by James

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    Absolutely Superb and Solid Entry Level eBike
    I've just received my new Zipper Z4 (late March '21) and have spent the weekend riding and tinkering. I am so, so pleased with the bike and would definitely recommend it to anyone that wants a smart-looking entry-level eBike that has some real off-road potential.

    I love the single crossbar design and the ability t fold is a bonus for transportation. The 21 Shimano gears are good and easy to shift. Disc brakes and pads work well and are effective. The suspension does its job over rough terrain and the front forks are lockable for road riding.
    The saddle is good and sleek with some padding. I haven't ridden for years so need to get over the initial saddle-soreness!
    The riding position is just perfect for me (a shade under 6ft tall).

    The electric assist works off a cadence sensor on the crank and you can adjust assistance from 0-5. On 5 you really have to do very little and you can make the bike really shift! There is a thumb 'throttle' for walk assist, which is a bit pointless really. However, when pressing this during riding it appears to give a bit of a 'boost'. There is also a 'cruise control' setting on the LCD controller, which can be activated when up to a reasonable speed.

    The power assist kicks in immediately and seamlessly when pedaling and the motor whirrs a little but is fairly quiet.
    The battery can rattle in the frame a little on rough ground, but I've stuck some slim adhesive felt on the battery to reduce that.
    It can be charged with the battery in or out of the frame and the charger has a red/green LED indicator to show charge status.

    The bike is really good value and feels solidly built and I think the whole thing looks really smart. The included LED lights are a nice touch too (don't overtighten that bolt on the front forks when fitting and use a couple of packing spacers!). Some components aren't perhaps the best quality, as you would probably expect on an entry-level bike, as most of the cost is in the power systems. However, overall it is very well constructed and you can always upgrade other components if you want to.

    Overall I'm extremely pleased with this bike and would recommend it to anyone that wants a stylish, functional and super fun ebike that can be used for occasional off-roading, regular use or just to have a blast on!

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