The Maxxcross SI is a go-to tire for GNCC and WORCS pros, and you will be equally impressed by its performance and longevity. Race-proven rubber compound delivers excellent traction in soft/intermediate conditions on the motocross track or off-road. Anti-flex knob bridges on side lugs offer solid straight-line stability and enhance grip for aggressive cornering. Developed in the Grand National Cross Country series. Perfect tire for any intermediate, loamy or muddy terrain. Developed and tested at the Grand National Cross Country Series, the SI's race-proven tire compound delivers excellent traction in soft/intermediate conditions. Its anti-flex knob bridges on side lugs offer solid straight-line stability. It also features enhanced grip to allow for aggressive cornering. The SI is proof that Maxxis takes performance and durability to a whole new level. Tire Specifications: