The carbon fiber artists from Basel already caused a stir in spring 2020 with the super-stable downhill handlebar "C1 DH", which weighed just 212 grams. In the fall of the same year, Ceetec presented their first full-suspension frame, the Phenum C10. For its successor, they once again drew on experience and knowledge from over 30 years of mountain biking, with the following goal: to build a competitive mountain bike that offers the best performance on all cross-country and marathon trails in the world. It should be fast, stiff and light enough for racers to unleash their full potential.

Nothing left to chance

Manufactured using Ceetec's modular C10 production process, which the company also used successfully on the C10R road bike, the new fully frame should be significantly better than before in terms of stiffness and ride feel.

Thanks to tests with aluminum and 3D-printed models, the makers came closer to the optimum step by step. It was also important to pay attention to the overall function, such as chain pull, braking behavior, geometry changes or zone loads, which change when the suspension is compressed.

This project was the small company's biggest effort to date.
Ceetec worked closely with Rock Shox and Sram to get the most out of the suspension. The 120 millimetres of travel (previously 103 millimetres) of the new C10FS should be velvety smooth and incredibly sensitive in its response, with what the creators consider to be a perfect spring characteristic curve.

New shape and many detailed solutions

The new frame has been significantly straightened compared to its predecessor. The C10 FS is designed to be even stiffer, and the new rear triangle also contributes to this. As the seat stays practically do not deform during compression, it was possible to dispense with a hinge (Horst Link).

3X-HM fibers were used for the best ratio of stiffness and lightness and joined to the finished frame using Ceetec's C10 Fiber Technology manufacturing concept. The frames are available in S, M and L and weigh 1882 grams in size M. The rear triangle also accommodates tires up to 2.45 inches wide and allows chainring sizes up to 38 teeth.

Geometry for size M

• Seat tube: 445 mm
• Top tube: 601 mm
• Head tube: 100 mm
• Seat angle: 75.5 degrees
• Steering angle: 67.8 degrees
• Bottom bracket depth: -36 mm
• Chain stay: 435 mm
• Fork offset: 44mm
• Wheelbase: 1060 mm
• Reach: 445 mm
• Stack: 603 mm

The new frames are now available via the webshop.

ceetec.ch/phenum-c10-fs