The ST900 has a special linear compound which helps keep moisture from entering the casing. Its 31/32” tread depth is designed for more traction and longer wear. It features a four steel belt casing construction which resists punctures, increases vehicle stability, and contributes to more retread cycles. Its application specific tread compound resists cutting and chipping. The ST900 is a rugged drive tire designed for off-highway operations. It’s built from the inside-out to be durable and long wearing.