You can find addresses of bicycle shops (and other shops selling bikes, bike parts and accessories) on the Hamburg Wandsbek map. Bike shops sell children's bicycles and tricycles, various styles of adults' bicycles such as mountain bikes, road bikes, folding bikes, BMX, tourers and so on.
Here are some tips for finding good bicycle shops to buy a bicycle:
Look for a shop that specializes in selling bicycles. These shops will have a wider selection of bikes to choose from and will typically have knowledgeable staff on hand to help you find the right bike for your needs.
Ask for recommendations from friends, family, and other cyclists. They may be able to recommend a shop that they have had good experiences with in the past.
Look for a shop that offers a range of bike brands and styles. This will give you more options to choose from and will help ensure that you find a bike that is right for you.
Check online reviews to see what other customers have to say about the shop. This can give you an idea of the level of service and quality of bikes you can expect from the shop.
Visit the shop in person and talk to the staff. This will give you a chance to see the bikes in person and ask any questions you may have about their features and capabilities.
Consider the location of the shop. If the shop is conveniently located, it will be easier for you to visit the shop and test ride the bikes they have available.
Finally, make sure the shop is reputable and has a good reputation in the community. You want to choose a shop that is trustworthy and will provide high-quality bikes and service.