As I was transporting my Carbent high racer to the Lancaster Country Ride, last Saturday, I heard a cracking sound as I turned a corner and the rear of the bike slid about 15". I had the fork installed in a fork mount on the floor of my van and the front of the bike secured with a tie-down to keep the bike in an upright position. Inspected the bike at Lancaster and couldn't see any damage, so I went ahead and rode it 42 miles. Last Tuesday, I started riding it at WRL and noticed the seat was moving back and forth as I pedaled. Inspection revealed the carbon fiber seat mount was not attached to the carbon tube frame member. It's a glued joint (aircraft grade epoxy). After conferring with the manufacturer, Bent Up Cycles, determined that the carbon frame tube had delaminated. The bike is 6 months out of warranty, so I'm up the creek. I'm not going to spend hundreds of dollars to send it to the manufacturer for a repair attempt and certainly not thousands for a new frame. Going to attempt to repair it myself with the epoxy the manufacturer originally used to attach the seat mount to the frame (Costs about $90) and hope the tube does not delaminate further. Guess I should have purchased a CA 2.0.  
 
 

 
W-shaped seat mount detached from frame tube.

You might consider reinforcing the glue joint with a metal strap screwed to the seat frame.  Titanium would be neat!  But aluminum should work.  

Quote from jayg on Apr 17^th, 2013, 7:24pm:

 
 
My money is on Jay completing  the repairs better than new......
 
 
 
 

Seriously, Dana won't fix it?

Well look at the bright side. You may need a new high racer. I hear the M5 is pretty nice.  

Quote from aikigreg on Apr 18^th, 2013, 2:17pm:

 
Yes, I have talked to him personally and been in contact with him via E-mail. When I first talked to him, thought the problem was defective glue bond. Told him I wanted to repair it myself, because I have worked with epoxy, and I wanted to ride the bike at Muenster, week after next. He sent me info on the glue and some instructions. I looked at the mount this morning and confirmed that the frame tube had delaminated, rather than the mount glue bond failing. As a matter of fact, there is a loose layer of carbon fiber on the tube that is not embedded in the epoxy matrix. Because of my 145 pound weight, Dana still thinks the bike will be safe to ride, if I repair it myself. The other options are to ship the bike to California and have my frame repaired or have a new frame frame built, using salvageable components from the damaged frame. Dana would discount the prices. I don't want to spend big bucks, so will probably attempt to repair it myself. Think I'll beef up the mount-to-tube joint by applying aircraft grade epoxy and fiberglass on each side of the mount and run it down onto the tube. This type of seat mount failure has been reported on only one other Carbent.
 
Speaking of high racers, my 2008 Corsa was a great bike. Should have kept it, instead of entering the carbon bike world.

I'm VERY surprised that Dana isn't just straight-up taking care of it.  That's not very like him at all.  I had a similar experience when my carbon aero 1.0 exploded after I dropped the front wheel into the great, except the frame was completely toast.  That frame had serious defects from the start which were kept very hush hush by Bacchetta.  I'm very thankful for homeowner's insurance.

Quote from jcsadowski on Apr 18^th, 2013, 4:24pm:

 
I didn't like the Euromesh seat, it killed my butt. It was a great bike after I replaced the Euromesh with a carbon seat. However, did have to stay away from mud, sand, and gravel, because it would go down in a flash.