Hey all, this post is for anyone who was looking for some "thicker/nobbier" tires than the ones that come stock on the Trek 520. With the fenders on, it was hard for me to find tires that would fit. Luckily, I have an awesome local bike shop in here in NJ that reached out to Trek for me and got a set of tires that had some more grip than the road tires "slicks" that came with the bike. I wanted a little more grip to be able to ride on some crushed gravel trails and did not feel 100% comfortable riding on "road tires". I don't have any experience with these yet as I just picked up the bike today, but wanted to let everyone know there is an option.
These are Bontragers CX0 / Team Issue Cyclecross tires 700 x 33