Give your mini the ultimate suspension upgrade with aluminum GTR shocks. The brilliantly-anodized aluminum shock bodies are coated with PTFE for the slickest damping action available. Their large bores hold more oil than standard shocks for consistent dampening over the roughest terrain. Slick titanium-nitride coated shafts resist scuffing, increase durability, and eliminate "stiction." X-rings keep oil in and dirt out for smooth suspension action. Spring preload and ride height changes are as simple as turning the threaded spring collars. The lower spring retainers even feature a locking screw to prevent annoying pop-off in the middle of your run. Shocks come assembled and silicone oil is included in the package. Sold as a complete set of four.