Campagnol has begun to sold mtb groupos at the end of 90ies until 92-93.
First generation as euclid was very massive (and heavy) with a star-trek design. Someone love it. Someone really hate it.
But Campagnolo with the high quality road part mind, has never understand the spirit of MTB. And, in comparison with an XT groupo, they were really expensive. But they were the first to develop 8 gears groupo, twist shifters…
In 1992, they sold new groupos like record OR or Icarus, with really beautifull crankset and brakes with the grafton design. But, like Suntour, they desappear around 1993…
They made very lightweight rims too like the "Contax" (under 400gr).