Here’s what I know about Bioracer. They are a Belgian company that is famous for 2 things: they were the first company to widely use a professional rider measurement rig to optimise riding position by exact positioning of seat post and stem etc. the frames were apparently often non-standard sizes, specific to the dimensions of the rider. Later on they developed a reputation for technical cycling clothing for pro riders, which they continue to offer today.
Here’s a Bioracer that confirmed the origins of the Stephen Roche Cork EL OS Model (at least in terms of paint finish). Note the characteristic paint scheme. Did Bio Racer make the Stephen Roche Frames, or were they made by Carrera(Podium) and finished by Bio-Racer of Belgium?
This bike features the Mavic ZAP system (rear derailleur electronic gear change). ZAP was first offered in 1993/4 which I think dates the frame to around this time. In 1999 Mavic introduced Mektronik. Who said that Di2 was new!?
Columbus Genius – TIG welded
55cm c-c / 58 c-t seattube
56cm c-c toptube
Cranks: Mavic ZAP 631 172.5mm
Brakes / Levers: Mavic ZAP 451
BB: Mavic ZAP 610
Hubs: Mavic ZAP 800
Headset: Mavic ZAP 305
Rear derailleur: Mavic ZAP 800 (new battery & working condition!)
Front derailleur / shifter: Shimano 105 / Suntour
Rims / Tires: Rigida SPH6 Ceramic / Continental Grand Prix 700×23
Saddle: Vetta SP Carbon
Seatpost: Suntour XC
Stem: 3TTT Pro-Light 120mm
Bar: 3TTT Forma SL 44cm c-c