ZTR Arch EX 29er Disc Wheelset - New for 2012 Stan's updated one of their best selling rims and made it even better.

The new Arch EX is lighter, wider and tougher than the original Arch rim! Once again, Bead Socket Technology construction provides superior tubeless compatibility.
The internal arch design provides durability and stiffness, two assets especially important for heavier riders. Although lightweight, the Arch EX can handle aggresive trail riding.
Quite possibly the best rim for any situation. Inspire confidence in your ride with the ZTR Arch EX.

SPECS
Total Weight                  1690 grams
Max rec rider weight        230lbs
Rim Material                    6061 Alloy
Rim Depth                      16.9mm
Rim Width External          24.6mm
Rim Width Internal           21.0mm
Front Hub                        3.30 Disc Front
Rear Hub                         3.30 Disc Rear
Hub Bearings                   Cartridge
Spokes                            2.0/1.7 Black Stainless
Spoke Nipples                   Silver Alloy
Front Spoke Lacing            32H, 3 Cross
Rear Spoke Lacing             32H, 3 Cross
Spoke Length Front (L/R)   292mm/296mm
Spoke Length Rear (L/R)    293mm/292mm