Originally Posted by
Wooden Tiger
Maybe it's the "posture" of sitting on a MTB that's different from that of the roadie, which is putting weight on different areas. If I ride the C&O wearing road shorts I get no protection in the rear, yet when I wear the same shorts while riding the roadie I don't have any issues and they're great.
That's my bet. You're back is probably closer to horizontal riding the road bike. Have you found any shorts that feel good riding your mountain bike on the C&O?