My 5s came from Merlins, good price, fast delivery.
7s and 5s have cartridge bearings. Easy to replace when they eventually give up the ghost.
3s have cup n cone with high quality balls.
Check out the rider weight recomendations on the owners manual bit in the Fulcrum link, they do have limits.
I always tell this one if anyones unsure of their strength...dropped my front wheel into the slot of a storm drain cover, not slow, not fast. It went with a hell of a bang and i though FFS
thats going to be buckled or bent. Not a mark on the rim, still true.
Remarkable, it really was a heck of a bang.
I found later it did mark the innertube where it impacted.