Features: 76mm wheels are designed for reliable performance at a greater value 76mm/SG5 bearings/6mm spacers 76mm/80A wheels are upgrade replacement value wheels Easy replacement SG5 Bearings and Spacers SG5 silicone/grease helps limit friction and increase speed Wheel kit includes: (8) 76mm wheels, (16) SG5 bearings, and (8) 6mm spacers preassembled for replacing wheels