The ROS is our first offering and the mainstay of our line. Double it up for optimal traction offroad or pair it with our CAVA in the rear to drift the corners a bit more. -Handles both pavement and dirt like a skilled musician handles a Stradivarius -Brevet compound for longer tread life on pavement -Robusto sidewall protection for getting rowdy on the one-track, touring and the rambunctious, rugged chunk guzzler. -High TPI mystery casing under that Robusto, BTW -Robusto means you can ride CERTIFICATION free -Tubeless compatible -Continuous center tread for optimal propulsion -Aeronautically designed delta knob pattern for superior braking traction during gravel re-entry -Tires packaged and sold individually -650b x 47.99mm and 700c x 42.?? -540g and 495g