Well, it's a heck of a lot more effective than plain tires, so what's your issue?
As long as they are put on tightly enough so as to no slip they should.
The obvious limitation with this vs a full track is contact area.
That will depend on what you want it to do. Effective at what?
Where a bushfire has swept through sandy country, all the small bushes burn to the ground. Then the wind blows away surface sand which provides a bed of sharpened, and fire-hardened, short spikes that halt progress. Foam fill might help, but without plates, the tires are still destroyed by the ground spikes. There is also the 100 km before the spike beds and another 100 km after.
So you're saying that the nails I've seen sticking out of my foam filled tires is my imagination? The foam effectively makes the tire into a hard rubber tire with give. The tire acts as if it is inflated with air but is not. I've used foam filled tires on other equipment which has tires that eventually wear to the point that there is foam showing through in many places. Seriously, if I had to remove tracks every time I need to fix an inflated tire it would not be worth having tracks on there. I don't know what kind of foam they use in NZ for such an application but it's apparently not what is used here in the USA.
But soft swampy ground is not limited to flat swamps nor is does it provide the base that is good for sled runners.
No. I am saying that maybe 200+ spikes in a tire after 1 km are sufficient to suggest that a foam fill will not help. There are situations outside your experience, so keep an open mind and try not to rule out the practice of others in situations you will never meet.
I am also unaware of NZ practice.
Then add those conditions to my inexhaustive list of relevant considerations for evaluation, but don't rule any unusual environment or technological solution out.
Then perhaps you shouldn't form an opinion about foam filled tires. I can tell you I've never had experience with foam in tires at road speeds. The foam I'm familiar with is in construction equipment. Googling turned up:
I am in Australia.
My bad, but that doesn't change anything. If you have specific experience, do tell.
My experience is that foam has it's place.
They are not only about allowing the vehicle traverse in some difficult terrains: their secondary purpose is to limit the erosion.
I do, but I do not need them on my skid-steer loader since it is ballasted with tire sealant.
And I'm assuming it doesn't have tracks. Putting foam in is an expensive way to go if not necessary. In my case I don't get into enough hardware to warrant foam on its own. But with tracks, I wouldn't have it any other way. Just too much trouble to fix a tire with tracks on.
Thank you for the picture! Here's what I do not understand (forgive me for sounding ignorant!) - the track wraps around the tire like a chain, but is its tread pattern anything resembling a track - because it still looks circular.
The one track wraps around two wheels on one side.
