Broader wheels and tires are faster aerodynamically, and a lot more snug to boot. S5 arrives specced with 28mm tires but has clearance for as many as a 34mm (measured) tire. The caliber of Shimano's Ultegra groupset is well documented, and its shifting functionality Along with the Microshift bar-close shifters https://vonb688htf2.wiki-cms.com/user