You can run them without sealant, tyre dependent, of course. UST tyre? Probably.
The aluminium spokes freak me out though D:
Well, yeah, but so what? Run em till they brake, chuck 'em away. Novatec hubs will die well before those Mavics crack, assuming R-Mash isn't a 130kg masher
Main advantage I can see is not having to faff about with rim tape to get them airtight. The aluminium spokes freak me out though D:
Mind you, I do have a 1.8kg rear hub...