Uncompromised Engineering
The Story of ξ /ksi/ cycling
The ξ /ksi/ cycling project was founded by Alexandros Siasos back in 2015 with a singular, uncompromising vision: to bridge the gap between high-precision manufacturing engineering and a lifelong passion for riding bike trials.
As both an active rider and a professional engineer with deep expertise in manufacturing, Alexandros experienced firsthand the technical limitations of mainstream trials hardware. Every component and tool we build is born directly on the rocks, designed to solve real-world problems that riders face every single day.
Our Three Core Principles
1. Perfection Over Mass Production
Our absolute mission is to develop the best bicycle components and maintenance tools possible, completely refusing to sacrifice material quality or machining tolerances for lower manufacturing costs. If a part cannot be made to elite standards, we simply do not build it.
2. 100% In-House Greek Manufacturing
To maintain absolute control over every microscopic variable of the production process, 100% of ξ /ksi/ cycling products are proudly manufactured locally in Greece. From the initial 3D CAD modeling and alloy sourcing to precision CNC machining and rigorous quality control testing, everything stays in-house.
3. Driven by Innovation & Utility
Our development route alternates between two distinct disciplines: advanced bike trials components engineered to push performance boundaries, and specialized workshop tools designed to make intricate bike maintenance routine fast and effortless.
An Evolution Trusted by the Best
What started as a grassroots effort to optimize personal riding gear has evolved into a globally respected hardware ecosystem used by enthusiasts and elite athletes alike. Today, our components are trusted on the highest competitive world stages by multi-time UCI World Champions.
We will continue to engineer, innovate, and manufacture uncompromised solutions—because we love the sport just as much as you do.