De Rosa SK Pininfarina Shimano Ultegra Disc Road Bike 2019, Size 50cm Posted March 29, 2024 De Rosa SK Pininfarina Shimano Ultegra Disc Road Bike 2019, Size 50cmDe Rosa SK Pininfarina. Small (5’2 – 5’7). View our in-depth size guide here. Shimano Ultegra, 50/34t – 172.5mm. Pirelli P Zero Race, 26c.