Well frame weighs in at 1647g, hence the question, I haven’t seen anything much lighter, what weighs 1kg in size large?
Agree on the tyres, but not going there…
TH, mainly agree, but I have carbon stuff which wasn’t any lighter, that’s not to say there isn’t lighter stuff available.
Cheers, & for balance my favourite MTB quote* was from Steve Worland who said in a review that a certain light Ti bike rode like a “spastic bambi”.
*Although you probably couldn’t get away with that nowadays.