If anyone is interested: 35mm Michelin Pro 5 on 21mm internal rim gives a 34mm wide tire. I mounted them on a Novatec R5 wheel set.
Total weight front wheel incl 160mm disc, valve and apr. 60ml tire sealant 1165gr.
Total eight rear wheel incl 140m rotor , valve and apr 60ml tire sealant 1340gr
I did not weigh the wheels before mounting the tires since I did not have a scale at work, but:
Michelin Pro 5: 395gr,
VMX rotor from AliExpress front 160mm 145 gr rear 140mm 116gr.
60gr (roughly) sealant
Wheels just under 1400 gr with valves installed. I think that is a nice weight.
Just heard from Wendy that the repaint of my fork will be done this Wednesday, and then everything will be shipped. So I might just have it just before Christmas.