From rims to spokes to hubs, everything about Industry Nine's Enduro 29er wheelset is designed to endure whatever abuse you can heap on them. While the wheels aren't exactly featherweight climbing material, their respectable claimed rim weight of 520g means they add a surprisingly low amount of rotational mass when you consider their bombproof reliability. The Enduro 29ers shrug off big drops, surprise square hits, and side loads that would buckle a boutique XC racing rim. The secret to durability in enduro kit is often girth, and I 9 isn't interested in challenging that truism. From the thicker than usual spokes to the healthy 31mm outer rim width, the Enduro 29ers bring huge planes to endure pain. I 9 does buck the prevailing trends in hub and spoke design, though, with machined alloy spokes that thread into the Torch hubs with a proprietary threading pattern that's actually thicker than the spoke itself, eliminating the stress point that most spokes suffer from at the transition from thread to spoke body. The hubs themselves feature a redesigned pawldrive ring interface, which reduces friction for smoother operation. The reduced friction doesn't come at the cost of immediate engagement, though, as the 120 points of contact and three degrees of rotation between engagement points mean your efforts translate to forward motion as soon as you step on the pedals. The wide, double walled rims accommodate the current trend of wider tires, maintaining a higher tire volume with more vertically aligned side walls than skinnier rims. You can run those plump tires with a lower PSI for more cushion without fear of the tire rolling off, all while enjoying the lower rolling resistance and better traction of the wider contact patch.