The ST901 has thick curbing ribs which helps shield the casing from sidewall damage. Its stone ejectors protect the casing from damage in the base of the groove and its extra thick layer of under tread rubber protects the belt package. The 32/32” tread depth gives priority to off-road traction. The spacing of lugs allows for placement of chains when even more traction is needed. Its application specific tread compounds resists tread chipping in high-scuff on and off road applications. This tire features a four steel belt casing construction which resists punctures, increases vehicle stability and contributes to more retread cycles. The ST901 is a tough traction tread designed for the most rugged logging and off-highway applications.