Industry Nine has been making Enduro wheels for almost ten years now. It makes sense the manufacturer is located in the heart of some of the rootiest, rockiest, nastiest technical terrain in the U. S. The Pillar Carbon Enduro 27. 5in wheelset is the culmination of all that experience trashing, building, trashing, and rebuilding wheels. The bombproof, ultra lightweight Pillar Carbon rims are laced to Industry Nine's ultimate hubs with 32 oversized aluminum spokes each. That's a recipe for some seriously tough wheels. The Pillar Carbon rims 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 26mm inner width, 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 Enduro 27. 5 uses 32 spokes per wheel for added 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 spokes diameter. The threads themselves are actually larger than the spoke for a strong interface with the hub. That ...