Nicolai S18 SWIFT Frameset (requires consultation for options) When only the best Aluminum Bike will do! Starting at $7366 USD current exchange rates apply

In the design of turned and milled parts, we use FEM software (Finite Element Method) 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, while material and weight can be saved at less stressed areas. In this way, highly complex parts and assemblies can be manufactured that combine maximum durability with minimum weight.

Hollow Milled technology is a design and manufacturing process that allows for maximum material and weight savings in the CNC production of highly stressed volume components without weakening the construction. For this purpose, the stress zones in the material are determined by computer simulation during the design phase. Highly stressed areas can thus be reinforced, while material can be saved in less stressed areas. This method is called topology optimization. Thanks to the deployment of state-of-the-art 5-axis milling machines, we are able to manufacture highly complex, hollow milled frame components from a single piece and transfer the optimized design with the highest level of detail.

From S to XXL, the geometry of the S18 SWIFT has been optimized according to size to ensure consistent weight distribution, handling and bike response across all frame and body sizes. This is a true size-proportional geometry that goes beyond the usual increase in head tube, top tube and chainstay length. Among other factors, the steering angle and seat angle also change depending on the frame size. This ensures that an optimum balance is always maintained between the front center and rear center. A constant, balanced ratio of reach and stack is also important to guarantee a consistent load distribution on the front and rear wheels. Only a loaded tire can generate traction on different surfaces. An uneven wheel load easily leads to understeer or oversteer. The geometry data of the different frame sizes, which at first glance appears arbitrary, is therefore no coincidence, but the result of extensive calculations and tests. The result is outstanding handling that offers both rookies and experienced riders maximum performance, control and confidence, regardless of body and frame size.

We build our frames from 7020-T6 aircraft grade aluminum, because we are convinced that this alloy is the superior material in the construction of mountain bikes. Compared to the 6061-T6 (AlMg1SiCu) alloy commonly used in bicycle construction, 7020-T6 (AlZn4.5Mg1) has about 30% higher tensile strength and about 20% higher elastic limit. Our frames are engineered and designed so that when overloaded, deformation occurs in a defined area of the frame rather than breakage, significantly reducing the risk of serious accidents and injuries. A NICOLAI aluminum frame is designed to withstand many years even under tough competition conditions. Aluminum is also 100% recyclable. Production waste and old frames can be repurposed into new, top-quality bike frames.

We weld our frames by hand using the TIG process. Our welders are specially trained for this and have many years of experience. For each model and frame size, a precise welding fixture is built, called a frame jig. In it, the CNC-cut tube sets are precisely assembled and fixated with all turned and milled parts of a frame that are to be welded. The frame components are first tacked with single spot welds at precisely specified points in a defined sequence and then, to minimize distortion and stresses, welded in several passes.