Description
Rim-Brake versions of 202 Tubular and 202 Firecrest Carbon Clincher, 303 Firecrest Tubular and Carbon Clincher, 808 Tubular and Carbon Clincher, 30 Course Tubular and Clincher 77/177 Rear 77/177 Front The addition of the 77/177 hub set from Zipp takes the Firecrest to a whole new level: Best-in-class durability and bearing protection, with no preload adjustment. Like the Cognition rear hub found on our NSW wheels, the 177 rear hub features a direct pull hub shell design on the rear hub to distribute the load placed on the hub flange away from the bearings for accurate bearing bores and smooth bearings regardless of spoke tension. We also took care to stack the opposing spokes on each hub shell arm to balance the load. This increases the fatigue strength of each arm and allows us to use less material to achieve a lighter hub. However, rather than stacking the spokes directly on top of each other, we staggered them slightly so that the spokes do not cross near the spoke head or adjacent stem where the spoke is heavily loaded, thus preventing spoke failure. Optimized hub flange geometry and spoke hole pattern with Sapim® CX-Sprint spokes (CX-Ray for 202 Tubular) to optimize torsional and lateral stiffness while improving durability. New robust hub shape with distinctive graphics. 17mm axle. For those seeking a wider gear range, or tackling particularly extreme terrain, an XD drive body for 177 is sold separately and is easily installed to allow more cassette options, including our wide range of 10-42t cassettes. The hub set is designed to allow replacement drive bodies without redesigning the wheel.
