Broader wheels and tires are faster aerodynamically, and a lot more snug besides. S5 arrives specced with 28mm tires but has clearance for around a 34mm (calculated) tire. The Aspero is created with gravel racers and go-fasts in mind. Its aerodynamic tube designs borrowed from Cervelo's Tour de France dominating https://edwardg824kkg4.wikijournalist.com/user