5 of the 15 miles of my commute is on the C&O canal in Potomac, MD. The surface is mostly packed dirt/light gravel/crushed limestone. Rattles my full suspension MTB with the shocks locked out pretty well. Will a cx bike be uncomfortable on this surface and should I instead consider a lighter hardtail MTB or hybrid with skinnier tires? On the other hand, these bikes won't be as fun on the road climbs included in the commute. Posted in the Mid-Atlantic forum also but not getting any hits. Thanks for any input.