Climbing wheels live and die by the gap between claimed performance and real-world durability. Marketing copy promises featherweight acceleration; reality delivers cracked rims on expansion joints and spoke failures mid-race. The Roval Alpinist CL II Rear Wheel addresses this tension through testing standards that nearly double existing certification requirements, subjecting the rim to impacts that would destroy wheels designed purely for scale numbers. The result weighs 769 grams including tubeless tape and valve while handling the punishment that road surfaces actually deliver rather than the idealized conditions that laboratory testing assumes.

The rear wheel uses the same rim as the flagship CLX II—33mm deep with 27mm external width and 21mm internal channel. That shallow depth reflects the Alpinist line's focus on weight reduction over aerodynamics, a positioning that acknowledges where climbing wheels provide their advantage. When gradients steepen and speeds drop, aerodynamic drag becomes a minor factor while rotational mass becomes the dominant one. The rim's carbon layup went through 50 iterations before Roval finalized the construction, each version tested for the balance between minimal weight and structural integrity that climbing applications demand.

DT Swiss 350 hubs provide the drivetrain interface, with Star Ratchet internals delivering 36-tooth engagement—10 degrees of pickup between pedal input and wheel response. That near-instant power transfer matters most during the micro-accelerations that climbing demands: responding to gradient changes, covering attacks, or simply maintaining momentum through switchbacks. Sealed steel cartridge bearings handle rotational loads with the long service intervals that DT Swiss hubs have established across decades of professional and amateur use. The Shimano HG 11-speed freehub body accommodates both 11-speed and 12-speed Shimano road cassettes.... Read More