- Because there is solid butter in the bearing, so the first time you use, you will be unhappy with the speed. Mount them on the skateboard or skateboard shoes and glide for some distance, then the internal solid butter will melt and the speed will be optimized.
- Pay attention to the bearing rust, avoid to play in damp places and best to wear gloves to mount them.
- If you let the bearing has a strong impact, then scratches, cracks may be caused.
- Double-side dust cover design, effective isolation from the dust.