No more leakage than any other tubeless setup. I never really have any problems with tubeless tyres not sealing decently enough o go and ride straight awaySweet
what about leakage? With less surface area (tyre bead to rim hook)... have you found tubeless set up slightly more laborious to seal up?
Not hard to seal with a hard n fast shot of compressed air. I don't even bother trying to use a hand pump with these rims, stans rims, AC rims, WTB rims ..... just go straight to the gas. I guess the issue may come if the rim bed does not have a sufficient diameter to hold the base of the tyre bead reasonably tight.
I have no experience with the LB ones in that regard.