32c would be the max recommendation (any larger you may need touring rims).
You can fit a front rack, but it'll affect the handling even with slight load, you got mount for a rear rack though.
However you can put something like this with p-clip on;
It also mean it won't stiffen the fork like a normal rack that's attach to the fork-end (the rake on the fork provide some comfort), and be able to carry a handlebar bag, I have something similar on my road bike, handle better than a porteur rack.
32c would be the max recommendation (any larger you may need touring rims).
You can fit a front rack, but it'll affect the handling even with slight load, you got mount for a rear rack though.
However you can put something like this with p-clip on;
It also mean it won't stiffen the fork like a normal rack that's attach to the fork-end (the rake on the fork provide some comfort), and be able to carry a handlebar bag, I have something similar on my road bike, handle better than a porteur rack.