This is a 1mm - wide small spacer. It serves as a thin washer for the BSS brake disc hub, ensuring smooth operation of the wheel assembly.
To use this wheel spacer, first make sure your wheel and BSS brake disc hub are clean. Then, simply place the 1mm spacer between the appropriate parts of the two - bearing BSS disc hub. When installing, ensure it's properly aligned so it functions well. As for maintenance, keep it clean and dry. Avoid getting it wet for long periods as it might cause rust. If you notice any signs of wear or damage, replace it right away to keep your wheel in good working condition.
