The Vittoria Cross EVO XM tubular is very light weight at 320 grams to deliver a clear advantage in accelerations. The tread is designed for bite in mud and loose conditions while still rolling quite fast. The widely spaced knob pattern is aggressively self cleaning so it won't clog when thing get muddy.
The Cross EVO XM has a supple ride and silky handling of Vittoria's unique 320 TPI casing. The flexible latex inner tube makes racing pressures as low as 35 psi a reality. A new tread compound, born out of MTB World Cup experience gives improved traction and control.
This Cross Evo XM tubular is equipped with Vittoria's red valve system which makes it a snap to replace and extend valves for deeper carbon-aero rims if you get the red Vittoria Tubular valve stem extenders. The valve stem is removed from the base where the valve stem connects to the tire. Red Vittoria Tubular valve stem extenders can be installed. You can also install the silver Vittoria valve extenders (installing the valve extender first and then the red valve on top) or you can simply install fill-tube type valve extenders over an open valve.