DARIMO IX2 LIGHTWEIGHT CARBON STEM

Description

Introducing the new Darimo IX2 stem, the perfect stem for your mountain or road bike with a weight of just 66 grams in 100 mm length.

The stem is manufactured in a single piece from unidirectional and bidirectional carbon fabrics. It has a careful construction and lamination that allow to reduce weight maintaining vertical and torsional stiffness. The front part has an integrated cap, non-removable, with the two screws on the bottom which gives a perfect aesthetic.

Like all our products, each stem is laminated by hand, then the exact number of carbon layers with correct direction are placed at each stem point.

In combination with carbon, M4 titanium screws are used with a bigger head to prevent damages during the assembly. The small nuts are made with anodized 7075 aluminum.

Specifications:

• Body: Unidirectional & Bidirectional Carbon Fibre Fabrics
• Nuts: Anodized 7075 T6 Aluminum
• Bolts: Ti Gr5 M4
• Finish: UD Matte
• Clamping Diameter: 31.8mm
• Steering Diameter:  1-1/8″ 
• Clamping Width: 46mm
• Stack Height: 46mm
• Angles:  -6º 

Why that shape?:

Why we produce a stem with not round section? Why not square?
It is not an arbitrary decision, it’s an engineered design.
After many computational finite elements analysis (FEA) we have manufactured the power with the perfect cross section.

The external dimensions allows an adequate alignment of the fiber with the handlebar and steering tuve. We have shown that a power with square-circular section (square with rounded edges), at equal weight, is torsionally stiffer and the stress is reduced by 20% compared to a perfectly square or round section. Therefore we have achieved the combination that provides the stiffer and lightness possible. The following graph shows the results of the analyses performed. We do not choose the shape, engineering chooses it.