He was in the final breakaway with eventually winner, Dirk Demol. I remember watching on TV both riders getting ready for the run into Roubaix(it finished on the streets that year), when suddenly a plastic bag strayed into poor Wegmüller's derailleur. The plastic bag jammed and even with the futile attempts from his team mechanic nothing would work. The tank was helpless. Demol easily won, hitting the line in just over 6 hours, 34 mins. Wegmüller dejected limps in, 2 seconds after. And a super fit Laurent Fignon came in 3rd, almost 2 minutes later.
The Swiss rider became a cult hero. Here's to 'the tank', remembered for his gutsy ride and for his ... his bad luck!