never called it an atb, was always a mountain bike, but this was my first yin, early nineties, a bit to big for me. I had to grow into it and it weighed a ton! The brakes were crap, and I always switched off the index part of the gears and just manually shifted. good fun though, better once I changed the tyres for some kinda chunk tioga efforts if i remember right.
(not my pic, but same bike.)