105 hubs are like the perfect storm of lightness, toughness, durability, and ease of maintenance. Whenever I see a 105 hub, I tend to grab them just to hoard them because they are so nice. Don't have any spares now though. I have a pair of classic hard anodized hoops from the late eighties that are waiting for a nice set of 105 hubs one day.

They may not be the lightest out there but they are plenty light for the grand majority of bicycyclists out there.