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Introducing the new Darimo IX2 stem, the perfect stem for your mountain or road bike with a weight of only 66 grams at 100mm length.
The stem is manufactured as a single piece from unidirectional and bidirectional carbon fiber fabrics. It features careful construction and lamination that reduces weight while maintaining vertical and torsional rigidity. The front part has an integrated cover with only two bolts at the bottom, giving it an impeccable aesthetic.
Like all our products, each stem is hand-laminated, allowing us to place the exact number of carbon layers in the right direction for each point of the stem.
In combination with carbon, M4 titanium bolts with enlarged heads are used to avoid damage during assembly. The support and thread parts are manufactured with anodized aluminum 7075.
Technical Specifications
- Finishes: 3K Gloss, 3K Matte, UD Matte, UD Gloss (the UD finish may present small voids due to the difficulty of expelling air with a weight increase of 3-4 grams).
- Weight limit: The Darimo Stem is safe and exceeds the ISO 4210-2 standard tests, however it is not recommended for weights over 90 kg, request the reinforced version in your case.
- Uses: Road, cyclo-cross and MTB.
- Handlebar clamping diameter: 31.8mm
- Available angles: -6º, -12º, -17º and -25º
- Lengths: 60-70-80-90-100-110-120-130mm
- Steerer tube diameter: 1-1/8″ and 1-1/4″ oversize version.
- Handlebar clamp width: 46mm
- Steerer tube height: 46mm
- Road handlebar compatibility: Darimo Ellipse. Not compatible with aero handlebars (wider at the top). Ask us to confirm if your handlebar is compatible.
We continue to increase the range of options according to user demand, consult us for the size you need.
Materials
- Body: Unidirectional and bidirectional carbon fiber.
- Nuts: Anodized aluminum 7075 T6.
- Bolts: Ti Gr5 M4.
Weight Table (±3%)
| Length | Weight |
| 60mm | 57g |
| 70mm | 59g |
| 80mm | 61g |
| 90mm | 63g |
| 100mm | 66g |
| 110mm | 70g |
| 120mm | 74g |
| 130mm | 78g |
Custom
If you want a different finish or if you weigh more than 90 kg, simply indicate it, we will manufacture a product according to your needs.
Why that shape?
Why have we manufactured a stem that doesn't have a round section? Why not square?
This is not an arbitrary decision, but an engineering design.
After many computational finite element analyses (FEA) we have manufactured the stem with the perfect section.
Starting from the external dimensions that allow proper fiber alignment with the handlebar and steerer tube clamping area, we have demonstrated that a stem with a square-circular section (square with rounded angles), at equal weight, is more torsionally rigid. The tension is reduced by 20% compared to a perfectly square or round section, achieving maximum rigidity and lightness possible. The following graph shows the results of the analyses carried out. We don't choose the shape, engineering chooses it.
Instructions
The IX2 stem with only two bolts and non-removable cover can be used with our Ellipse road handlebar. In the following link or video you can see how to install the road handlebar on the IX2 stem:
