It's only lighter if you spend ££££ in a good cassette. Otherwise not that much.
Not a dig at 1x, I have it and like it, just 42t in a road bike looks wrong. Get a compact
But the clutched mech is heavy, the arm is longer and the cassette is much much heavier.
Same thing than the frame pump some pages back, because it's cool and practical in a gravel/tourer/Instagram bike doesn't it make cool in every bike. Race bikes be racey IMO
It's only lighter if you spend ££££ in a good cassette. Otherwise not that much.
Not a dig at 1x, I have it and like it, just 42t in a road bike looks wrong. Get a compact