One wall of the rim is drilled with a tapered point with carbide that heats the alloy, and pushes it inside the rim. It creates a chimney that can then be threaded. The integrated M7 nipple can be screwed directly into this thread.
_The rim is stiffer, which provides a better power transmission
_The rim has better fatigue resistance (4 times stronger)
_On MTB wheels, this makes the rim airtight for UST tubeless compatibility