2021 Haibike Hardnine 4 Electric Mountain Bike in Cool Grey

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cool grey / lava matt



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The 2021 Haibike Hardnine 4 Electric Mountain Bike in Cool Grey is a 29” wheel hardtail mountain bike with a strong drive unit and a well thought-out component mix including a 120mm suspension fork. Although this is a full capable off-road bike the 29” wheels also mean it is fast on the road and on cycle paths, making the Hardnine 4 a good all-rounder.

The efficient and versatile Bosch Performance Line motor provides dynamic acceleration and always offers you the right level of assistance while the 400wh battery gives plenty of range for short to medium rides. Shimano gears and powerful disc brakes ensure smooth and safe off-roading fun.

This bike is perfect for

Riders who want an off-road capable electric mountain bike that can also work for commuting and weekend rides with the family.

Key Features

  • Fast 29” wheels and capable 120mm fork
  • Bosch Performance Line motor and 400wh battery
  • Reliable Shimano gears and Tektro brakes

Electric Bike Updates and Diagnostics

As electric bikes have become more sophisticated it’s important to stay on top of updates. Just like your home computer or smart phone regular updates are now released for most electric bike systems. If you buy a bike from Cycles UK we will do electric bike updates and diagnostics you need free of charge.

Electric Bike Updates

Electric bike updates can help to improve battery life, tweak how the motor works and fix bugs and problems. Most systems will require you to plug your bike into some specialist software at an authorised dealer. At Cycles UK we are authorised dealers for top electric bike brands including Specialized, Trek, Orbea, Whyte, Cannondale and Raleigh. As a result our stores have the software and hardware to run updates on all the major electric bike systems including Bosch, Shimano and Ebikemotion.

Free Electric Bike Updates and Diagnostics

We now provide free updates and diagnostics for life on any electric bike purchased from Cycles UK.

Electric Bike Motors Explained

Electric bikes have really come into their own in the last couple of years. Thanks to advances in electric bike motors and batteries. A couple of bike manufacturers, most notably Specialized, are making their own electric bike motors. The vast majority of bike companies are using the same motors. So, you will find exactly the same electric motor being used on bikes from different brands and at different price points. In this guide, we’ll take you through the main types of electric bike motors. Look at the differences between the most commonly used brands.

Electric Bike Hub Motors vs Mid-Drive Motors

Electric bikes tend to either come with a hub motor or a mid-drive motor. Mid-drive motors sit where the cranks and bottom bracket are on a bike and drive the cranks and chain around. Hub drive motors sit in the middle of the wheel and drive the wheel directly. Hub drive electric bikes are cheaper but less efficient, and less smooth, to ride.

Read our guide to electric bike motors

Price Match at Cycles uk

We understand that price is important, so we regularly price-check our competitors to make sure we have the best offers available. We recognise that we will not always be the cheapest, so if you see the same product cheaper from any of our competitors then please get in touch via the form below and we will do our best to match any reasonable advertised price.

Colours cool grey / lava matt
Sizes 46CM
Brand Haibike
Model Year 2022
Barcodes 4054624122125, 4054624122132, 4054624122149
SKUs / Part Numbers 45022147, 45022149, 45022151

Please note: Manufacturers can sometimes change the specification of the products from time to time.

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