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 whith 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.
Finishes: 3K Gloss, 3K matte, UD matte, UD gloss (the UD finish may have small voids due to the difficulty of air flow and a weight gain of 3-4 grams).
Weight limit: The Darimo stem is safe and exceeds the tests of ISO 4210-2, but it is not recommended for riders over 90 kg. Request the reinforced version if necessary.
Uses: Road, x-cross, MTB.
Clamping diameter: 31.8mm
Angles: -6?, -12?, -17? y -25?
Steering diameters: 1-1/8??and 1-1/4??oversize version.
Clamping width: 46mm
Stack height: 46mm
Road handlebar compatibility: Darimo Ellipse. Not compatible with aero handlebar (wider at top zone) We will inform you if we found more handlebars compatible with the stem just ask us.
We continue increasing the range of options according to the users demands. Ask us the measure you need.
-Body: Unidirectional and bidirectional carbon fibre fabrics.
-Nuts: Anodized 7075 T6 aluminum.
-Bolts: Ti Gr5 M4.
60mm-57g ? ? ? ? ? 70mm-59g ? ? ? ? 80mm-61g ? ? ? 90mm-63g
100mm-66g ? ? ?? 110mm-70g ? ? ? 120mm-74g ? ? 130mm-78g
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.
The IX2 with only two bolts stem can be used with our Ellipse Road Handlebar. In the next link or video at bottom of the page you can see how to asemble both products together: