Solid Fill Tyres When there is an environment that includes extreme exposure situations. Where tyres are obtaining large cuts and are being ripped open, then it is absolutely necessary to have solid fill tyres. There are however several draw backs to solid fill tyres: The tyre will weigh 3 – 5 times heavier after being filled and could prove to be cost excessive rather than cost effective. If the process is not performed correctly the first time, the same tyre cannot be re-filled. It has to be a new tyre. The extra weight of the tyres and rigidity due to the lack of air in the tyre is known to cause early equipment failure due to metal fatigue. Recapping is out of the question as in most cases the tyre has to be cut off the wheel for the installation of a new tyre. The vehicle is restricted to 20mph