Originally Posted by
base2
A Rodriguez High toller disc This is my bike.
...and thats the thing, I don't know how much tread I need 'cause just I don't know anything about "gravel touring" across states. I only know gravel local & what I have (32's) won't be good & my fear is 51mm mountain knobbies may be too much.
I'd recommend at least 1.5, although ive ridden with 2in a lot on gravel, both tires with minimal tread, like regular marathon or Supremes.
without knowing those trails, I would tend to agree that mtb knobbies are overkill.
I would strongly suggest doing a bunch of gravel road riding to see how comfortable you are with a given tread. My experience is that I don't need much.