For what it’s worth, I run 32mm on my gravel bike, and that’s seen some shit. You’d be fine with under 38mm for rail trails (and more).
This is great info too. I would take it into my LBS, but I’d be afraid they would judge me because I didn’t buy a $2000 bike for hobby riding.
Dude, this is crazy. Thank you so much for your help! I’ll look into a new setup.