Traxxas Steel Constant Velocity Driveshafts are designed to handle the extreme horsepower and articulation that a T-Maxx* or Revo can dish-out. The inner and outer U-joints are lubricated and sealed by a rubber boot for maximum protection against the elements, and the U-joint pins are held captive by a lightweight aluminum sleeve so you never have to worry about losing a pin. The nickel plated steel shafts, blue silicone boots, and red-anodized aluminum accents not only look good, they are designed to exacting specifications for ultimate strength and performance. These are simply the most advanced steel CV driveshafts available. *For TRX 2.5R w/ optidrive and short wheelbase 3.3.