In the ION-G15 we have answered your calls for a powerful 29 enduro bike with GEOLUTION geometry and have also provided the G15 with a GPI version, i.e. with Gates timing belt and pinion transmission. With the Pinion P1.12 transmission perfectly integrated into the frame we extend the already impressive capabilities of the bike and create a truly unique bike. Downhill, the GEOLUTION geometry and the low centre of gravity, as well as the lower unsprung mass on the rear wheel provide an undreamt-of downhill potential. Uphill, the combination of GEOLUTION and a full 600 % transmission ratio results in an almost limitless climbing ability. With the ION-G15 GPI you can not only leave the gas at the Enduro race or in the bike park, it is also fun at home on the trail lap. With its low maintenance and unrivalled range of applications, the ION-G15 GPI is a bike for every situation. Enduro race, big mountain adventure or technical alpine cross… it’s up to you.



We design a unique jig for every model and frame size. The tubes and machined components are turned and milled as necessary and then mounted in the jig, fitting perfectly together. Then, these parts are tacked together by spot welding.

The frame is then welded in several passes by TIG (tungsten inert gas) to reduce distortion. By reducing the distortion as much as possible it improves the alignment of the frame. Our flat, even welds are time-consuming but ensure that the material is properly fused, improving strength.



The rear triangle of a full suspension bike is not a statically rigid component and is exposed to extreme loads during driving. Critical points are the ball bearings, which ensure low breakaway torque and optimum response of the chassis. In order to extend the maintenance intervals of the frame, Nicolai products rely exclusively on full complement, double-sealed ball bearings.

Pinion Option


The Pinion GmbH transmission is low-maintenance and optimally integrated into the bicycle frame. The central centre of gravity and the lighter rear wheel bring noticeable advantages in handling, driving dynamics and rear performance. The transmission responds to shift commands in a flash.

Topologie-optimierte Struktur

A bicycle frame and its components are exposed to extreme forces during use. In order to develop a durable, robust but also lightweight bicycle frame, all components are designed at NICOLAI GmbH using topology optimization.



With a NICOLAI frame, you decide the design. Every Nicolai frame can be produced in any colour according to your preferences. Choose from different frame colours, anodised colours for reversing levers and pull holders as well as frame decor to add your individual touch to the frame.


Rear Aligning Dropout

So that you can hit every lane on the trail, we mount a form-fit sliding, exchangeable dropout for track and camber adjustment on all frames. Due to the differently milled, right dropouts for adjusting the lintel, the rear only needs to be slightly readjusted after installation. This takes the strain off the material. The respective lintel height is milled into the RADO with the digits 0, 1, 2 or -1 and -2. After the toe and camber have been set, the RADO is fixed ex works with a pin. This makes the original setting easily reproducible during replacement. This is the only way we can guarantee that NICOLAI products work precisely on the track.



With the ET-Key, the range of application of the frame can be adjusted in a few easy steps. The ET-KEY changes the kinematically active length of the compression strut. With the models ION-G13, ION-G15 and ION-G19 you can adjust the steering angle and the bottom bracket height, e.g. for a visit to the bike park or a steeper trail. With an ION-G16, the shock absorber length can be adjusted via the ET KEY and thus the spring travel can be changed. The damper length/stroke can be changed from 216x63mm to 222x70mm. As a customer you can fully rely on the performance of your Nicolai frame. In the depth of the technology we do our homework and with the introduction of the ET-KEYS we have introduced a robust and simple adjustment technology.


The manufacturing quality itself is not yet an added value for a customer. The following two added values result from production quality:

Durability & precise driving characteristics

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 riding characteristics are achieved when the rear wheel is precisely straight to the front wheel and even a layman notices that an oblique bike rides strangely (but usually he thinks it’s because of his riding ability).



You can order, pay for and pick up your tailor made frame directly from us or from your Nicolai dealer. For technical details, please contact us directly. First we need to know why you want to ride a custom-made frame. Most of the reasons lie in the past.


Einzigartiges, kompetitives Enduro Geometrie-Design

“We don’t care about trends! All that matters is lap times, driving pleasure, safety and the physical facts.” This quote from Kalle Nicolai describes Nicolai’s approach to the development of new mountain bikes. This mission statement has made NICOLAI one of the most innovative bicycle companies in terms of chassis performance, steering dynamics and geometry.


If after a few years of hard work a bearing on a Nicolai frame needs to be replaced, a RADO needs to be replaced due to a fall or a frame needs a new coating, the NICOLAI service staff is the right contact. Since we at NICOLAI manufacture all small parts on our machines, we can also produce spare parts for older models if required. We therefore guarantee spare parts availability of at least 10 years for all Nicolai products.


You can now configure the ION G15 GPI as a complete bike. Components from HOPE, FOX, SRAM, MAGURA, RESET, CONTINENTAL, SQLAB, RENTHAL are available. Choose your wheel size and configure your dream bike now.