The Dually. Appropriately named as its at least twice as wide as a "regular" 29er rim. This double walled 45mm wide made in the USA rim is sure to get the most volume out of your tires possible. I built these up on some 170/135mm hubs for use on my fat bike as a fast moving "mid-fat" solution for when the full on fat tires were just too much.
Building with these rims was a pleasure, they easily came true during the build and even tension was achieved without much fuss. Both rims I got were within 20 grams of the claimed 675 gram listed weight. The rims are not eyeleted but that did not have any disadvantages during my time on them. The Velocity website states that these rims are tubeless ready, but I never did set up my tires tubeless with them so I cannot comment on how they hold up tubeless.
I mounted up the only readily available 29er+ tire, the Surly Knard. I used the 120tpi version. Riding these wheels around my local trails (sandy twisty sinlgetrack) was a pleasure. Some of the float of the fat bike with more traction than a regular 29er. There is a weight penalty over regular 29er wheelsets, the wide rims are heavier as well as the tires (900 grams for the ultralight Knards). They roll faster than a full on 4" fat tire and are lighter. Its almost the perfect in-between wheel setup. The wheels are quite tall however because of the 29 x 3" tire, the actual height is closer to 31". This size will limit things like chainstay length and toe overlap in the smaller sizes on bikes built around these wheels.
I really like the 29er+ format and the Duallys do not disappoint. They stayed true and strong under my 260lbs. Now I'm just waiting for more dedicated 29er+ bikes to come out along with a suspension fork that can easily take the girth of these wheels.
There are also some 650b+ offerings hitting the market soon, which will be closer to 29" actual overall height and might work nicer with some of the shorter fat bikes out there. Velocity is making a small run of Dually 650b+ rims that are available now.
I give the Duallys 5/5 stars.
The Bric...._ mountain biker, road rider, heavyweight gear abuser. Built like a brick sh*thouse. No bike is safe.