The new SHAMAL ULTRA C17 represents the same fantastic performance that has made it THE go to aluminum race wheel for the better part of two decades while adding even more versatility and performance. The new, wider profile meets the C17 standard and is perfect for use with the increasingly popular 25/28mm tire sizes. The new rim/tire interface proves to be more aerodynamic when compared to the same size tires mated to a C15 rim. The new C17 also allows for a more surefooted grip in addition to increased comfort while increasing rigidity and thus reactivity at the same time thanks to its wider stance and optimized material usage. Redesigned Shamal Ultra with C17 rim design 2-way fit rim is compatible with clinchers and tubeless tires 17mm internal rim width for a more efficient tire profile when using 25mm and larger tires Reduced aerodynamic drag and rolling resistance Shamal Ultra C17, Wheel, 700C, Clincher, QR, OLD F 100, R 130, Brake Rim, Pair