The glue bonds on the Vitus frames have been holding up very well on the bikes, through the years.
Weakest area on the early 979 frames was the original design for the seat lug seatpost clamp.
There were enough cases of owners overtightening the seatpost clamp that it cracked at the clamp ears which totalled the frames, unless the seat lug is replaced by a qualified shop or Vitus themselves.
Because if this Vitus changed the seatpost anchoring method to one that uses a grub screw that pressed against (More like dug into, if the grub screw supplied did not have the pivoting bearing tipped grub screw.) a flat machined vertical strip at the back of the supplied proprietary seatposts from Rubis at around 1984-1985ish......
Last edited by Chombi1; 09-26-22 at 11:36 PM.