Traxxas Slash 4x4 Complete Precision Steel Ball Bearing Kit (21) Advantage Complete Ball Bearing Kits are custom packaged for your vehicle. Bearings are organized by size in small resealable bags. These kit is a great choice for Upgrade from Stock Bearings or Bushings, Maintenance Rebuilds, or Keeping a Full Set of Spares on-hand. Advantage Bearings have been run by some of the fastest racers in the world and have won multiple ROAR US National Championships. Over 250,000 bearings have been sold to satisfied racers all over the world! Meets/Exceeds OEM Bearing Specifications. Please reference your manual for required sizes and installation instructions. Known to be Compatible With: Traxxas Slash 4x4, Traxxas Slash 4x4 Platinum, Traxxas Slash 4x4 Ultimate