Hi there, not sure who's told you 330g? more around 350g-370g. I'm about 13.5-14st in riding gear. They held up fine when i had them, xc/trail riding...red/black runs, odd small jump, never buckled them. But a wheel is only as good as the build.

 Hey there,
how are the Olympic rims holding up?
Also: how heavy are you; what are the "biggest" things you've done on them; what do you ride?

People say that they are way too light at 330g!

 im sure i've seen this riding about