Oil-filled 139 mm long-travel aluminum GTR shocks tame the toughest desert terrain with their silky-smooth damping performance. The aluminum shock bodies are threaded for easy ride height adjustments using the spring retaining collar. The bright anodized finish adds high-impact style to your Unlimited Desert Racer^® and keeps the shocks looking fresh run after run. GTR shocks are sold fully assembled with silicone oil. Springs sold separately.