Track Conditions – Soft Terrain (soft soil, mixed mud/dry) Two front tire sizes, 80/100-21 for traditional feel on the track and the all-new 90/100-21 with a taller profile for increased contact patch and better feel and feedback through hard edged ruts All new MX compound for improved longevity and durability Light weight carcass Flex zones incorporated into carcass for improved cornering grip and drive stability Flex zones incorporated into all tread rows to improve the feel and grip of cornering and accelerating