Quad Roller Skate Bearings

7 mm bearings are lighter and used traditionally in artistic and derby skating. They require a 7 mm axle. Because they’re narrower, they spin easily but may not handle heavy lateral loads as well as 8 mm bearings.

Removable rubber shields can be gently pried off with a pin. Metal shields may require specialized tools and careful handling. Clean the bearings thoroughly before re-lubricating and reinstall the shields carefully to avoid deforming them.

Speed creams or light synthetic oils reduce friction and are ideal for indoor and jam skating where speed is paramount. For outdoor use, consider slightly thicker lubricants to provide better dirt resistance.

Derby skaters often choose high-precision steel bearings with good sealing to withstand impacts and dust. Many prefer slightly looser lubricants to handle repeated side loads. Some brands offer derby-specific bearings with reinforced cages.

Use a bearing tool or the truck axle. Slide one bearing halfway onto the axle, then lever it out of the wheel using gentle rocking motions. Take care not to bend the axle or damage the wheel hub.

Only if they’re still in good condition. Bearings exposed to dirt and moisture may lose their smoothness even after cleaning. Once rust or pitting occurs, bearings should be replaced.

Yes. Some Swiss-style bearings are marketed for quad skaters. They use high-quality materials and precision manufacturing, providing a longer-lasting smooth roll. They’re more expensive but valued by competitive skaters.

Using axle washers or speed rings prevents friction between the wheel and the axle nut, ensuring the wheel spins freely. They also reduce wear on the wheel hub. Use one washer between the bearing and axle nut and another between the bearing and the hanger if needed.