Ladies bike was yesterday.

Seriously? A low-entry model with off-road capabilities? Exactly. Practically maintenance-free and technically up-to-date: With the most powerful BOSCH motor of all time. With carbon belts instead of a chain, with a continuously variable transmission instead of gear shifts. In a top design.

The UD3 offers maximum convenience and outstanding safety besides minimal maintenance. Stepless shifting in every driving situation – even under load or at a standstill. This makes the UD3 one of the most durable, low-maintenance and stable e-bikes ever.

Bosch Performance CX motor

BOSCH's strongest motor with 85 nm torque

No chain

The GATES CDX carbon belt lasts 10 times longer. It is oil-free and clean, maintenance-free and whisper-quiet.

Stepless transmission

Variable control instead of switching - with up to 380 % transmission range. Fully encapsulated, efficient and 100% maintenance-free.

Outstanding stability

Highest quality materials, stable frame, stable value. The UD3 is an e-bike for life in the word's best sense.

Bosch CX Power

With a mere 2.9 kg and a 48 % reduction in size, the current Bosch CX motor is the undisputed benchmark for mid-mounted motors. It accelerates with exceptional power, reacts without delay and now assists with up to 340 % of the pedal force used. Its new transmission concept reduces pedalling resistance to a minimum, providing a natural riding experience even at speeds above 25 km/h or with the engine switched off.

Available with the following command centers

We install the Intuvia display from BOSCH as standard on the UD3. Simple, intuitive and safe operation on the separate control unit and a large display distinguish this on-board computer.

Not only is it easy to switch between the five riding modes plus push assist, but also to call up information such as speed, charging status, distance and much more. In addition, the gearshift recommendation shows the optimal moment to shift into another gear using an arrow display.

The SmartphoneHub turns your pedelec into a fully connected e-bike – and thus into a part of your digital life: even without a smartphone, the SmartphoneHub offers all the essential functions of a regular on-board computer. The integrated display always shows the most relevant riding data. With a smartphone and COBI.Bike app, however, the SmartphoneHub becomes an intelligent control center with (off-road) navigation, fitness tracker, alarm system, light control, multimedia entertainment and much more. What’s special about this is that all these functions on the mobile phone are operated intuitively with the left thumb, with no need to take the hands off the handlebars. App available for iOS and Android.

Kiox offers all the functions that a sporty driver needs. The slim, scratch-resistant colour display is controlled via a separate control unit with tangible pressure points. It provides riding data on speed, own performance, heart rate, battery charge and much more. With Kiox, you have all the essential information at your fingertips.

A Bluetooth connection with an optional chest strap means you are always informed about your current heart rate range and can thus exercise optimally. The Bluetooth Low Energy interface also offers software updates to be downloaded to your onboard computer without a cable connection.

Nyon connects to the smartphone via the eBike Connect app and exchanges data on routes and activities. As an intelligent guide, the colour display supports you when exploring previously unknown places and, with fitness data, acts as a personal trainer. The all-in-one onboard computer can be operated intuitively and easily via the touchscreen. While driving, it is controlled via a separate control unit. Whether for extended tours or short everyday rides: the robust and perfectly viewable display is ideally equipped for all requirements and all weather conditions.


The new Bosch PowerTubes, which HNF-NICOLAI installs in the UD3, store a total of 625 Wh of energy. As an Intube battery, they disappear discreetly in the frame of the XD3, where they are safely housed. They are easy to install and remove and can also be charged directly on the bike.

Available with three different gear boxes

enviolo from Fallbrook Technologies is the standard in stepless gear shifts for the e-bike. With a wide transmission ratio of up to 380%, the enviolo TR offers ideal comfort for every driving style and terrain.

In line with HNF-Nicolai’s philosophy, the enviolo is entirely maintenance-free. Unlike conventional gear hubs, it can also be shifted under load or at standstill. With these advantages, the enviolo TR is a perfect choice for the majority of all e-bike riders. We therefore install the enviolo TR on the XD3 All Terrain as standard, unless a different transmission is required.

The maintenance-free, continuously variable, high-end automatic transmission enviolo AutomatiQ ensures unprecedented quiet and comfortable driving. You choose how fast you pedal – the enviolo AutomatiQ does the rest. This way, you always sail through the scenery in a constant flow, regardless of hills and wind.

Use your Bosch display or the enviolo app to set your preferred cadence, and the transmission will adapt automatically. The lightest gear is automatically engaged if your vehicle is at a standstill. So you always have the optimal gear ratio for maximum acceleration when starting. The consistently optimal gear ratio also extends the range of your e-bike battery.

Speedhub 500 from Rohloff is the gearbox for e-bike pilots with unique requirements. The Rohloff Speedhub 500 offers, among other things:

  • the widest gear ratio (526%) – equally suitable for the steepest climbs and the fastest descents
  • the highest degree of efficiency of all gear hubs worldwide,
  • a lifespan that equals the mileage of several round-the-world trips, and
  • Fourteen extremely evenly graded gears in a hermetically sealed housing.

We install the Rohloff Speedhub 500 as an option on customer request. And it always comes with the electronic e14 control, which conveniently changes gear within an incredible 180 milliseconds – including motor synchronisation. Skipping several gears is also no problem. And when you stop at the traffic lights, the Rohloff Speedhub 500 automatically switches back to its starting gear.


The RockShox Recon is the ideal suspension fork for the XD3 Premium e-bike: It combines low weight with a highly stiff chassis. The particularly firm RockShox steel uprights allow for a significant suspension travel of 120mm. Thanks to the Motion Control ™ RL damping, the RECON is the new reference for ultimate driving pleasure.


The M2's dual-piston calipers provide excellent braking performance in all conditions. Supported by a slim and compact lever design, this braking system offers exceptional and consistent reliability in both dry and wet driving conditions.


Quiet, maintenance-free and long-lasting. E-bikes with extremely powerful central motors place special demands on their drive system; you can literally watch them wear and tear on conventional chains. Gates has optimized the Carbon Drive CDX specifically for the performance requirements of the e-bike and thus developed a new, remarkably durable and maintenance-free system. It's 20% lighter and lasts up to 10 times longer than a well-maintained steel chain. And best of all: unlike the chain, the belt does not elongate with time. No need for re-tensioning.

As bright as a supernova

The Supernova MINI 2 uses the unique Terralux3 lens in its highly compact housing. The brightness is 235 lumens.

The built-in overvoltage protection combined with a soft start upon switch-on ensures a long lifespan for the MINI 2. Thanks to sophisticated light guiding, the Terraflux lens directs 90 % of the light to where it is needed most: the road.

Uncompromising Quality

For more than 20 years, our co-founder and CTO Karlheinz Nicolai has enjoyed the highest recognition worldwide for the exceptional quality of his German-made frames. With his passion for vehicle construction, he is committed to ensuring the exceptional quality of HNF-NICOLAI e-bikes. From product development to sample frame construction and final inspection, all processes are available in-house at HNF-NICOLAI. Whether in our design and development centre in Berlin, in our factory in Saxony-Anhalt or at NICOLAI Maschinenbau in Lower Saxony, where our frames for the XF series are manufactured - even off the downhill race tracks, Kalle Nicolai vouches with his name for bikes of the highest quality.


MTB 27.5 '' S/M (up to 170cm) or L/XL (from 170cm)

Bosch Performance CX 25 (Gen. 4)

RockShox Recon RL Silver 29'' SA100 mm; ZOOM EM868 / 869 HLO 80 mm; EXT Air 29'' 100 mm

battery pack
Bosch PowerTube 625 Wh

Bosch Intuvia Optional Bosch Kiox, SmartphoneHub Sport

Power transmission
Gates Carbon Drive (carbon belt)

Gates CDX 55T for Bosch

Enviolo Pedelec Belt
Gates Carbon Drive Belt CDX 125T

Gates Carbon Drive Belt 122T

Rear pulley
Gates CDX 28T / Gates CDX 22T

ROHLOFF rear pulley
Gates CDX 20T

Clarks M2 180mm (Pedelec)

gear box
enviolo TR, optional: enviolo AutomatiQ, Rohloff Speedhub 500 E14

Gear lever

Ergotec Swell RE 100mm, angle adjustable

Moon bracket 31.8 / 625mm

Selle Royal Shadow

Seat post
Humpert Atar 31

Miranda Delta

Marwi SP-823

HNF-NICOLAI aluminum

Racktime (up to 25 kg)

Supernova MINI 2

Schwalbe Super Moto-X

up to 25 km/h

black matt | red matt

approx. 25.5 kg | 150 kg

€ 4,695

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