My first was a Miele mtb but I never really could ride that thing off road. I got my hands on an M800 C’dale in 87 ish and that was the first off road bike purpose built for the job. It sucked at speed but climbed like a goat over the rocks and crap I had for trails back then. Prior to that I was a kid screaming around the Back river woods in Montreal on a succession of Peugeot road bikes since 72.