what is the advantage of a fixed wheel?
I run with it, I walk on sidewalks and streets, I shop in it and go to the aquarium. Do I need a fixed or pivot wheel?
Fixed wheel jogging strollers are designed mostly for those flat-out open spaces with a lot of different types of terrain. If you are a dedicated runner you might want to consider this type of jogging stroller for its stability and durability. However, if you'll be using your jogging stroller in urban areas as you described above you may be happier going with a jogging stroller that also offers a swivel wheel such as the Bob Revolution SE Stroller - Duallie. Swivel wheel jogging strollers are great for tight places that require a lot of moving around, going around corners, or avoiding obstacles such as people in a crowd.