I believe Brats are an ethnic food. They are a common food in a certain country, and I believe they may drink beer with them, but I could be wrong. When I attempt to find a beverage match for a certain food, I look to the culture from which the food originated and find out what the locals drink with it and it's usually been a good match.
P.S. - I do not believe the folks in Mexico drink wine with their spicy cuisines, but I could be wrong.