Broader wheels and tires are faster aerodynamically, and more comfortable to boot. S5 comes specced with 28mm tires but has clearance for approximately a 34mm (measured) tire. The extended seat tube cut out - designed with the P assortment - delivers added aerodynamics. The bikes can be found for a https://cervelo-bike-price86059.blogunok.com/26970421/little-known-facts-about-bicycle-helmet