1600 lbs...
Depends on the vintage of the wing kit.
But no, it is not max. gross weight
Do you know how one would identify the wing as one or the other?
Gee, nobody's even mentioned the fuel weight can of worms.
if you go to vans web site you will see that the latest RV-8 AND RV-8A wing is listed at 1600 lb aerobatic and 1800 lb gross weights . the early wing was redduced to 1550 lbs aerobatic but retained the original 1800 gross weight .