polycarbonate is the strongest clear plastic.
i think glad is the strongest
Glooble
i think glad
So that if it hits anything it does not effect your bike and plastic is the most lightest and strongest material.
Polycarbonate
There are a wide variety of plastic storage bin companies. The strongest and most popular is Rubbermaid, which has a long history of making durable plastic storage boxes.
Most quality play tunnels are made of a flame retardent nylon mesh with steele rings.
ABS plastic is used quite often in airsoft guns, especially in guns made in China. The strongest plastic in airsoft is probably the plastic used on the Real Sword Type 97, which is advertised as "high strength polymer material" but is really the same plastic used on the real steal Type 97 (since both the airsoft and real steel versions are made by the same company it is probably the best built airsoft gun externally short of a CTW or PTW). In the market it is often hard to tell which guns have high quality plastic and which have cheap plastic because it is all advertised as high strength or high quality polymer. The best way to tell is to go to an airsoft store and feel it for yourself. Also, the price of the gun is usually a dead giveaway, because any gun with really good plastic will be over $300.
Plastic is not one substance, but a whole category of substances. The definition of plastic has changed over time, and not everyone would agree on the same one, though most people would recognize something as a plastic. One category is the polyalkanes, such as polythene and polypropylene and these are very unreactive. Another type is PET or polyester, which is much more reactive, though still not violently so.
Metal because they are much stronger... I would recommend eagle sport wheel as they are the strongest metal core wheel or get yak metal core.
strongest