Cult classic: KLEIN Quantum (1991) in Sovereign Blue – Size 52 (KLEIN 55) – just serviced For enthusiasts and collectors! Due to lack of use, I am selling this beautiful, very well-preserved KLEIN Quantum racing bike from the legendary era of Gary Klein (handcrafted in Chehalis, USA, year of manufacture 1990/91). Highlights: Frame size 52 cm, drivetrain 3x9 Shimano Ultegra gear system, high-quality mix of Shimano Dura-Ace & Ultegra brakes. Condition: Freshly serviced and ready to ride! Tires: Brand new Continental Ultra Sport tires installed. The racing bike is technically in impeccable top condition. The frame is structurally completely intact, crack-free, and without dents. Visually, there are signs of use corresponding to its age and unfortunately some visible paint damage on the frame (see photos). An honest patina for a classic. Paintwork: The bike shines in the rare, classic original color Sovereign Blue. This model impresses with a continuous, intensely glowing metallic blue tone, against which the white lettering beautifully stands out. Price: CHF 950.– (negotiable). Viewing and test rides in the area possible by arrangement. Pickup preferred.