1/10 scale XX-long GTR shocks represent the peak of suspension technology. Their 13 mm bores hold over 70% more oil than the standard Ultra Shocks. X-ring seals keep oil in and dirt out for smooth, consistent damping, and plush 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. Includes 30-weight pure silicone shock oil. (Sold in pairs, springs sold separately)