I seem to have a problem with the drivetrian.(prophet 1000) No matter what I do when I hit real sharp stutter bumps or a hard climb with ruts or rocks it skips out of gears. I cant seem to ride hard over rough or hard climbs.(seem like there must be a ghost on my bike! who would like a different gear.) I have had three brand knew drive train's and 5 chains in 8 month's.Tried 5 different mechanics just to make sure it wasn't a mech. missing a problem. I have totally given up on this bike. The rep doesn't want anything to do with this situation anymore. It sucks when you spend $2600 + I added a demax rear rim to stiffen up all the lack of rigidness in the rear end. Not to mention the problem with the rear hub loosenint up every 3weeks. Canonndale did send me knew rear wheel and hub but it's junk. I changed the drive train over to all shimano XT didn't fix the problem now I'm back to all scram again except the brakes. I was a die hard klein man until trek let them die. So I thought cannodale was impoved from the early 90's from the cheap tin can feeling bike and crack prone problems. Looks like I was wrong?