Originally Posted by
pdlamb
My concern would be the tire size; 28s are kinda skinny for the dirt and mud you'd find on the C&O. (I understand the GAP is crushed gravel, so it might be a better choice.) You might make it in late summer or early fall, as long as it's dry.
Have you considered running over for a weekend ride to see the trail and try it out?
28s will be fine as long as it isn't deep mud. I rode the Erie Canal trail on 25s and found then ok for surfaces ranging from tarmac, through loose gravel to sections of mud and rocks.