The Firestone FD663 is a drive axle radial developed for local P&D service, long haul and regional applications. Its extra-deep 26/32" tread depth ensures excellent wet and dry traction, even in mud and snow. The aggressive lug tread is specially developed with tie bars to ensure solid traction, even wear, and an ultra-long tread life. Its open shoulder design provides superior traction in tough weather conditions, while the strong four full-width steel belt construction fights tread squirm and enhances retreadability.