Death of Balaton-Couch
On 300 km marathon "Grachtentour", during riding a cobblestone route in Overijssel/NL, the frame broke. :-(
On the cobblestones the frame buzzed and vibrated like a vibrator. Suddenly the vibrator was switched off and the seat shell sagged a little piece more deeply. After the Balaton couch rolled to standstill, the frame break was ascertained. Both frame parts were still held together by the damaged seat shell.
The frame has internal cables. The break goes exactly through the outlet of the rear wheel brake cable. In all probability the Szatuna frame has died by vibration cracking.