The Roctane ST/STX lines redefines the standard for rock crawling and aggressive trail delivering our most trail conquering tread to date. Deep .75-1.0 inch multi angle tread blocks and low center void excels on the trails while the wider spaced, staggered tread blocks grip in the loose terrain. The ST model features a medium tread compound and 10-ply carcass which utilizes a reinforced lower sidewall and heavier ply cord resulting in extreme durability. The new carcass maximizes ride quality and the trackability is unmatched on loose or hard pack terrains. The STX sticky model features a combination of a flexible 8-ply carcass and proprietary soft tread compound which results in one of the best rock crawling tires on the market. The soft compound and carcass flotation set a new standard in slick surface traction. Super deep rim guard protects wheel lips and helps avoid pinch flats at lower psi.