It is a protective device and equipped on the alloy wheel. They are in the tubeless tyres.It may guarantee your car keeps driving for more than 2 hours when the tire  become a runflat one during high-speed driving. It may prevent traffic accident for sideslip and direction off tracing caused by tyre blowout. So

Product features :

1. equipped simply. keep your car and tire structure unchanged.

2. strong and light.Maintain existing car balance . Don't affect fuel

consumption.

corrosion resisting , lifetime, non-repeated installation, lifetime safty.

More information, pls contact me.