Revitalizing the iconic former Karstadt sports building in Mönckebergstraße, Hamburg, the project, "bike.stadt sports”, envisions a sustainable hub dedicated to the ever-growing cycling culture. By merging commercial spaces with interactive features such as test tracks, advanced bicycle storage solutions and a bicycle ramp, which wraps around the building and connects the stories to the pump track on the rooftop, the concept addresses both urban challenges of bike storage and the city's commitment to eco-friendly transport. Seamlessly integrating indoor and outdoor environments, it embodies a forward-thinking approach to cityscape rejuvenation, offering a multifunctional space where cycling enthusiasts can shop, repair, and engage in a community-focused atmosphere.