It's easy to follow the trend when buying a new bike. Maybe it will be a mountain bike even though you cycle on roads or a racing bike even though what you need most is a bicycle basket.

- If you have a suit in the morning, it becomes very crowded when you are double weight on a racer, it is important to think about what to wear the bike for, says Lars Strömgren, Cykel promotion.

In the video above, Lars lists three common mistakes when buying bicycles and shows what you can look for if you are going to buy a used bike.