Specalized sirrus sport with 27 gears with 700cc tyresYes of course, you may need to modify your speed, especially if the conditions are wet or mucky
What bike is it? What tyres does it wear?
A rigid hybrid on off-road tracks! I wouldn't.....
http://www.cyclechat.net/threads/trans-pennine-trail-whats-it-like.140534/#post-2677666
(I'm the one in the yellow shirt on the rigid hybrid with panniers and mudguards)
Or the first several years of mountain biking. Those original mountain bikers, Gary Fisher, Tom Ritchey, Joe Breezer were all using old Schwinn Excelsiors, then getting a ride back up the fire road at Mt. Tam to ride it again.Its not the lack of suspension that will be your problem - there was a time before suspension forks were invented and people rode off road. anyone remember BMX?