Broader wheels and tires are faster aerodynamically, and more snug besides. S5 will come specced with 28mm tires but has clearance for up to a 34mm (measured) tire. Though it sits around the stiffer and quicker conclusion of points, the Aspero five can continue to be a hoot to experience. https://cervelo-p2-triathlon-bike30837.myparisblog.com/27209179/bicycle-rack-no-further-a-mystery