About the Fenix SLA Disc 105. With the Fenix SLA Disc all-round road bike, you have a responsive, comfortable performance racer that glides over cobblestones – at an affordable price! Very few aluminium road bikes include as many hi-end technological features as the Fenix SLA Disc. It benefits from a diamond-shaped down tube, solid rear triangle and straight fork – all features of the Fenix SLiC designed to combine comfort and power. In addition, the tubes of the Fenix SLA Disc are triple-butted. Each tube has a thin center wall, which thickens towards the end. This makes the frame lighter and stiffer. Finally, you can also customize this bike’s colors, which is unique in the world of cycling – especially for an entry-level all-round road bike. Ridley’s aluminum bikes undergo a meticulous high-tech process using 6061-T6 aluminum alloy for its excellent stiffness, fatigue resistance, lightness, and welding precision. The triple-butted tubes, three times thinner in the middle, minimize weight and maximize stiffness. Hydroforming shapes the tubes with pressurized water to avoid damage. They also employ double-pass flat welding in crucial areas for extra strength and a clean finish. Frame: Fenix Sla, Aluminium. Rear Derailleur: Shimano 105. Front Derailleur: Shimano 105. Saddle: Selle Italia Model X.