All the aerodynamic performance of the G SES 4.5 Pro with the premium hub. G SES is where aerodynamics meet the realities of modern gravel. The G SES 4.5 builds off the profilic success of the SES 4.5's design by delivering top honors in aerodynamics, handling dynamics, versatility, and weight savings when compared to gravel aero wheels of equal or greater depth, with the exception of the G SES 6.7.