This is my goto place for anything bike related. Although Amsterdam is full of bikes, I had some…read moreissue finding a full fledged repair shop in the neighborhood. Then, I discovered Frederic's establishment.
The actual bike shop is just around the corner on the Binnen Brouwersstraat. It is here that you can choose a rental bike or just leave your own to be repaired by one of the skilled employees. The selection is quite vast and rates economical, not to mention that if you are a tourist, you could also arm yourself with a bike map.
I have never had to leave my bike here for extended periods of time as they always fix it up quite soon. On the rental side, the selection isn't good for off-normal sizes, but that is somewhat expected throughout the city, at least without paying a lot of money.
My only complaint is that the hours are somewhat unfriendly for people who live and work in the city, as it is almost impossible to get service outside of office hours.