Maxxis Tire 80/100-21 M7311 51M Maxxcross Si Tm88185000

The Maxxcross SI is a go-to tire for our GNCC and WORCS pros, and you will be equally impressed by its performance and longevity.

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

Race-proven rubber compound delivers excellent traction

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.