Roctane STX sticky 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. Deep 0.75″-1.0 multi angle tread blocks and low center void excels on the trails while the wider spaced, staggered tread blocks grip in the loose terrain. Redefines the standard for rock crawling and aggressive trail delivering our most trail conquering tread to date. 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. NHS (Not for highway service)..