What Our Gearhead(R) Experts Are Saying:"The 0. 41-degree engagement on these hubs ensures there's no dead spot between where I start pedaling and where the wheel responds. The alloy rims and steel spokes are reasonable for a wheelset that can take a real beating."Why We Like ItThe Grade-S uses Industry Nine's hollow bead wall rim construction, which adds pinch flat resistance and impact strength without a significant weight penalty. J-bend steel spokes in a 32-hole pattern keep the build stiff and field-serviceable. The wheelset carries a Full Power Class 1 E-bike approval, so it handles the added load of our motor-assist drivetrains without compromise.