I'm new to racing this year. At my first race I was talking to someone and I mentioned that I would be racing in the Cat 4 masters 35+ race and the guy laughed and told me that this category is pretty fierce. So as a new rider, should I be racing in cat 4 or the cat 4 masters 35+? Advantages and disadvantages. I'm not fast but I've been riding bikes for a long time and getting faster in CX. And I placed roughly the same in the two races I've done; one race being cat 4 masters 35+ and one cat 4 and masters 35+ combined.