Wheels are the most important component you can hang on a bike. The weight and stiffness of your wheels affects every aspect of the ride. Industry Nine is one of the most respected names in cycling, and wheels are all it makes. The Pillar Carbon 29 Trail Wheelset is Industry Nine's top dog for all mountain riding no expense was spared in the design and manufacture of the Pillar line. The Pillar Carbon rim is light and stiff and is laced to Industry Nine's best hub, the Torch. Don't let its light weight fool you the Carbon Trail 29 can take a beating. In other words, you're looking at the best of the best in 29 inch mountain wheels. These aren't just any run of the mill epoxy and fiber reinforced rings. Industry Nine enlisted help from the composite wizards at Reynolds Cycling. This means that these 28mm wide outer, 24mm inner, tubeless rims feature Reynolds' MR5 technology. It focuses on five key elements spoke face, nipple bed, tire channel, rim sidewall, and hook bead in order to optimize resin chemistry and carbon layup for the structural loads of each component. The result is the Pillar Carbon rim with Twin Pillar hookless bead walls. The rims, found exclusively on Industry Nine's Pillar line of wheels, are tubeless ready and offer an excellent strength to weight ratio and ride quality characteristics. The Carbon Trail 29 uses 32 spokes per wheel for durability. Instead of steel spokes, I9's wheels use 7075 aluminum. The spokes are straight pull, and they have a 25% greater cross section then comparable 1415 double butted steel spokes. In other words, these spokes have a stronger tensile strength. Also, on traditional spokes, threads are rolled, not cut. This adds to strength, but creates a stress riser where the thread channel is narrower than the diameter of spoke itself. Industry Nine, however, doesn't need to roll its threads. Instead, they're created during the machining process, but cut so that the thread channel is the same as the spoke's d..