Lighten Your Bike, Not Your Wallet Conquer mountains, flatten hills, and feel your bike come alive with this utra-light 1365 gram wheelset. Mass is the enemy of performance, and the Alpinist CL is the lightest wheelset in its class. Weight has been pared to the absolute minimum to make the make the most of every watt and deliver incredible responsiveness without sacrificing any of the strength, ride quality and durability that are crucial to long-term performance and satisfaction.