2PCS Bicycle Vacuum Tire Valve Nut with Sealing O Ring Aluminium Alloy Vacuum Tire Valve Nut Inner Tire Valve Nut Accessory for Mountain Road Bike Black
Function: For inner tyre valve, vacuum tyre valve locking nut modification and replacement, replacement of the locking force is greater, better airtight.
Application: reduce the impact on wheel balance, so that riders can get better race results, colourful, so that your riding life is not monotonous!