From 9989.00€


We have been building mountain bikes for 25 years, and for over 10 years we have also been building e-mountain bikes, or E-MTBs for short. E-MTBs work on the same principle as pedelecs, assisting the rider with pedaling up to a speed of 25 km/h with the help of an electric drive. But if you think you can transfer the old-man image of pedelecs to E-MTBs, you’re sorely mistaken. A mountain bike is a radical piece of sports equipment, and an E-MTB is an even more radical piece of sports equipment. You don’t exert yourself any less with it, you go to your limit just as much. The only difference is that the summit you climb is twice as high, the destination twice as far and the single trail twice as fast. An e-MTB is simply more fun to ride.



At the heart of our 2021 EBOXX models is a BOSCH Performance Line CX motor. The completely revised 4th generation of the most powerful BOSCH drive can boast numerous new features and improvements in 2021. With a maximum of 85 Nm of torque, the latest CX unit is even more powerful than its predecessors. The maximum power output now reaches 340% of the rider’s own power. This is noticeable through improved acceleration and more power at low cadence or in large gears. Starting on steep inclines has also become much easier as a result.





The BOSCH Kiox on-board computer serves as the control center for the E-BOXX models. For 2021, the unit has been revised once again and the ergonomics improved. The scratch-resistant, large color display is optimally readable in all lighting conditions thanks to adaptive brightness control. In addition to the standard functions such as riding mode display, speed, battery charge, distance and range, the gear engaged at any given time is also displayed in combination with the Rohloff E14 gearshift.


BOSCH has also improved its sensor technology and software to achieve even more sensitive response and smoother power delivery. A 32-bit processor processes a large number of sensor signals, which are called up over 1000 times per second, for optimum power characteristics in the selected driving mode. In the new Extended Boost mode, for example, the rider can effortlessly climb off-road steps or obstacles without a full turn of the crank and the risk of pedaling. A short pedal impulse is enough, the BOSCH program recognizes the situation and pushes the rear wheel.


As a BOSCH partner, we have been working closely with the world’s leading developer of e-bike drives for many years and are very familiar with their technology. That is why we do not speak of installing the BOSCH drive but of integration. This means taking into account a wide range of technical aspects concerning the drive itself, its secondary characteristics and the entire periphery.

ROHLOFF E14 Speedhub

Following the concept of system networking, it is only logical that we rely on ROHLOFF gears for the EBOXX E14. The indestructible 14-speed Speedhub from the Kassel-based manufacturer has a total gear ratio of 526% and is the most reliable of all hub gears with the highest efficiency. Especially for use in E-MTBs with a mid-motor, Rohloff has equipped the E14 Speedhub with an electronic shift control that communicates directly with the software of the BOSCH drive.


Clean. Smooth running. Robust.

For a quiet, direct and backlash-free power transmission between the drive unit and rear wheel, we have chosen the GATES Carbon Drive for the EBOXX E14 Rohloff models and are the first manufacturer to offer this combination on an E-MTB. The carbon fiber reinforced drive belt transmits the high, added forces of rider and motor approximately with the efficiency of a steel chain to the rear wheel without elongating.


To achieve the maximum potential of a suspension system, after the frame design, the choice of the right suspension elements is crucial. We therefore only use shocks and forks from the US market leader FOX and the exclusive Italian racing forge EXT in our EBOXX models. FOX has been a high-end MTB supplier from the very beginning. As a technology leader FOX sets with its products again and again the benchmark against which the other brands must be measured.


Our 2021 EBOXX models are equipped with a wide range of new parts and options. The first thing that catches the eye is the newly developed FOX 38 Float suspension fork with the new GRIP2 shock cartridge, which replaces the previous FOX 36 Float. We offer the fork exclusively in the top variant “Factory” and with 160 mm travel. Due to improved stability and stiffness, the fork has received approval from FOX for brake discs up to a size of 230 mm.


What started out as fun has become one of our best sellers. The Explorer Kit offers our valued Nicolai customers a variety of uses: An eMTB as a commuter bike? Why not! Just ride your favorite trail to work all week long. With storage space for a few purchases, lighting for one more extra lap on the hometrail and a lock so that your favorite machine is also safely waiting for you in front of the bakery. In the summer cycling through the Alps? No problem! We do not care about traditional conventions. The kit is available for both the E14 Rohloff and the QLF variant with derailleur. It consists of SKS® mudguards, SUPERNOVA® lighting system, ABUS® security lock, PLETSCHER® side stand as well as a TUBUS® luggage rack and ORTLIEB® panniers. If you do not need everything, you can order many components individually.

5 Frame sizes

All NICOLAI models are offered in 5 frame sizes, from S to XXL. This means that customers with body sizes between 1.55 and 2.10 meters can be optimally served, a range that few other brands provide. Building a perfectly fitting frame means much more than just scaling its basic shape. We take various factors into account here with regard to body proportions and rider weights, for example adapted tube cross-sections and particularly low step-in and protrusion heights for S sizes or frame reinforcements that take into account the high weight and greater body strength of XXL frame riders. Production at our own site also allows us to customize our products specifically for people with handicaps or special needs.


We provide a 5-year warranty on all frame models against breakage and material failure, even in racing use or jumps. The prerequisite is that the respective models are used within the scope of their designated purpose and have only been equipped with components for which an approval has been obtained. In addition, we guarantee the supply of spare parts for all models for a period of at least 10 years.


A NICOLAI bike is easily recognized, even without the brand lettering, by its characteristic wide-scaled welds and the machined aesthetics of the milled parts. Nothing is sanded down or concealed. The industrial design language is not an end in itself. It traces the product’s development process, makes the logic of the design transparent and reveals its properties and functions. This not only creates trust in the product, in its quality and durability, but also ensures a high identification potential of our brand within a constantly growing fan community.


In addition to the geometry, the chassis of a mountain bike, in particular the construction of the suspended rear triangle, is the most important factor for riding fun and performance. A variety of requirements must be technically solved here. In order to achieve kinematics that offer competitive performance and maximum fun on the trail but at the same time decouple the rider’s movements from the work of the suspension, we have long been designing our 4-bar link rear triangles according to the proven Horst Link principle.


Geolution was developed by us in cooperation with Chris Porter from the English brand GEOMETRON. The concept is based on the idea that a longer wheelbase, a flatter steering angle and a steeper seat angle make the bike faster, smoother, easier to climb and safer. Climbing characteristics are improved because the steep seat angle and long front end position the rider to prevent the front wheel from rising on steep climbs.


When designing turned and milled parts, we use FEM software (Finite Element Method), which can be used to simulate the loads that will occur in later use in order to determine the optimum shape (topology) of these components. Critical areas of the design become visible in this way and can be strengthened by adding material, whereas material and weight can be saved in areas subject to less stress.



The manufacturing quality in itself is not yet an added value for a customer. The following two added values “longevity & precise riding characteristics” result from the manufacturing quality. Only if the welds are welded deep into the root and have no notches, a bike frame can withstand the impacts from the ground for many years without breaking. Precise driving characteristics are achieved when the rear wheel is precisely straight to the front wheel and even a layman notices that a crooked bike drives funny (but usually thinks that it is due to his driving skills).

Why Aluminium?


We remain true to our philosophy that 7020-T6 aircraft-grade aluminum is the superior material for mountain bike construction: all milling and cutting scraps, as well as discarded frames, are 100% recycled into the starting material, which can then be used to create new, high-quality bikes again.


The so-called swingarm – MUTATOR is also a newly developed by us component on the rear swingarm, which combines many functions in only one component:

The mutators are available in different lengths (33, 41 and 47mm). In this way, only by exchanging a mutator, the length of the swingarm can “grow” with the frame height according to our GEOLUTION concept.


For double the range, a second battery can be carried, for which we offer an optional secure quick mount on the top tube. Unlike e-bikes with two battery slots, where both batteries usually always have to be inserted, customers here have the choice between double the range or a significantly lighter bike.



With a NICOLAI frame you determine the design. Each Nicolai frame can be produced in color according to your preferences. Choose from the different frame colors, anodized colors for bell cranks and cable holders as well as frame decor to give the frame your individual touch.


Rear Aligning Dropout

So that you hit on the trail also every track, we mount on all frames a positive sliding, replaceable dropout for track and camber adjustment. By the differently milled, right dropouts to adjust the camber, the rear must be readjusted after assembly only slightly. This relieves the material. The respective camber height is milled into the RADO with the numbers 0, 1, 2 or -1 and -2. After toe and camber have been set, the RADO is fixed at the factory with a pin. This makes it easy to reproduce the original setting when replacing it. Only in this way can we guarantee that NICOLAI products function precisely on the track.

Trade and distribution

NICOLAI frame kits and complete wheels are offered through direct sales and can either be ordered as a regular model variant or individually assembled with a variety of equipment options via an online configurator. Personal discussions and direct contact with our customers are our top priority. With a test bike selection, we regularly visit bike parks and trail centers, where interested parties can extensively test our bikes after prior registration and receive individual advice.

Bike Configurator

The GT1 EBOXX E14 can be individually defined as a complete wheel in the configurator. Components from the manufacturers FOX, EXT, ROCK SHOX, INTEND, HOPE, MAGURA, TUNE, CONTINENTAL, SRAM, LEVELNINE are available.





FOX RACING SHOX 38 Float 160 GRIP2 Factory BOOST, 2021

Rear shock



ACROS Block Lock


HOPE AM 35mm/35mm


ACROS Gothic 780/35 Rise 25mm


MAGURA MT7, HC Bremshebel 203mm


SQlab 70X - M


HOPE FORTUS 35 W 27,5" Felge / Rohloff Speedhub, 14- Gang

Front tire

CONTINENTAL Der Baron Projekt ProTection Apex 29x2,4"

Rear tire

CONTINENTAL Der Baron Projekt ProTection Apex 27.5x2,6"


SQlab 60X Ergowave active - 140




Miranda 160mm

front Beltring

GATES Riemenscheibe 50t


BOSCH CX Performance Line


BOSCH Power Tube 625 Horizontal Black




ROHLOFF Speedhub, 14- Gang


ROHLOFF Speedhub, 14- Gang

Rear beltring

GATES Riemenscheibe 20t (S, XL, XXL) | GATES Riemenscheibe 22t (M, L)


GATES Riemen CDX 128T






Test rides can be done anywhere in Germany. Try it!


From the date of purchase you get 5 years warranty. We also ensure a ten-year supply of spare parts.

100% Handmade

All NICOLAI frames are manufactured in Germany. This is the only way to ensure our high quality standards in the long term.