5x11 Rubber Sealed Ball Bearings (10) 5x11x4 for Traxxas RC Vehicles 5116 TRA5116 Slash Rustler Includes 10 replacement 5x11x4 Ball Bearings for Traxxas RC Vehicles Dual Rubber Sealed with No Contact Seals, ACER Racing HCCA ultralite balls Exceeds OEM specifications 100% synthetic ACERGoo lubricant Made by ACER Racing industry leaders in RC bearing technology since 1989