Thanks for the response R1lee.
Yes tubeless ready I meant. I think you're right about the rubber too. The wheelset was sent to them from Giant as a demo set.
im tempted to pull the trigger on them - I was pretty impressed. And no, no brand issues here. No one will be able to see the Giant branding as I pass them anyways

hah
anyone else have / use them. Or other suggestions around $850 that might be worth looking at ?