There Are Two Kinds of Foam Fill
First, there is a fill called "Foam Fill". It has been around for a long time. Technically called "Tire Fill", it resembles liquid bowling ball material and is very heavy. It doesn't foam but It does come in several densities and is great for earth moving equipment, mining trucks, agricultural equipment and others.
Another fill called "Foam Fill" can also refer to another type of tire fill product that actually does foam when mixed. But this foam will have weight limitations and can only be used in small Bobcats, lawnmowers and situations where the weight is less than 1000lbs.
But...... Foam Fill, Tire Fill, Chunking, or whatever it is called has weight limits.
If the need is to exceed the load capacity written on the tire, then use Tire Fill, (liquid bowling ball), if the need is only to flat-proof and not exceed the weight limit, the use the Foam Fill.
Air Free has an article about this. Synair, Carpenter, Arnco, all have liquid bowling ball tire fills in several different levels of jiggle. Simply poke a hole in the tire, insert tube and pump liquid in. About 24 hours later, the fill hardens, very simple, but not cheap. There are hundreds if not thousands of places in the country that perform this.
Arnco, Amerityre, Urethane International, have Foam systems that are different. This type of foam is harder to produce and has weight limitations but what makes it so attractive is that it is much lighter, resulting in less rotational mass and rider discomfort. Not very many places provide this type of foam.
For the most part, when people refer to Foam fill, they are almost always talking about the liquid bowling ball material.
Ask questions about foam filling and we will answer them here.
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