As long as you grease them. And when they say "pack the bearings" make sure you pack them and get grease around the rollers and between the roller and inner race. I smear grease on the spindle and copious amounts on the outside of the bearing before I install them in the hub. I don't completely fill the cavity but there's always grease left when it's time to repack again. I do them about like this guy but I add a bit more grease. I hand pack but also have a bearing packer like he uses. They work pretty good.
