It doesn't matter at all what the weight a bike
carries, because it is not a living being who needs to pass vet checks and be
fit to continue. If you want to make that comparison, there is
none.
If you keep the weight divisions
as they are, then weigh only the rider, not the tack or water bottles etc.
This makes sense to me as mountain bike racers do not weigh their bikes, &
many have different makes & models of bikes.
Otherwise if you add more
divisions & keep weighing the tack etc? Since the very small people
already
have even an extra division in their favor (Featherweight, not just
Lightweight), it is only fair to the heavyweights to add the Super Heavy
Weight division. This would probably be 210, 220 or over for that division.
MHO