Vittoria Reaxcion 29er Mountain Wheelset. The Vittoria Reaxcion 29er mountain wheelset is an exemplary all around cross country choice. Light enough to race, strong enough to ride every day, the Reaxcion's 29 alloy rims sport an asymmetric design that makes for a laterally stiffer rim, particularly in conjunction with Vittoria's PG straight pull spokes. The hubs are built for Center Lock disc brake rotors and are set up for thru axles front 15x100 and rear 12x142. The wheels are also tubeless compatible and feature Vittoria's Speedlock rim design that keeps tubeless tires securely in place as well as eases tire installation and removal. As an additional concession to weight and performance, the Reaxcion also features an alloy cassette body to shave precious grams. And yes, this is the same Vittoria that enjoys a lengthy and storied position as a purveyor of professional level tires. They've now entered the world of wheels with typical Italian flair and craftsmanship.