I see what you mean, most bikes have tubeless tyres! I'd have thought it was mostly for bikes because of the weight issue - or lack of it in a bike. I haven't had time to read Tim Hobbs' google links but I'm sure I have read that it is a non-permanent repair, and companies will charge more to change a tyre filled with these puncture repair foams and slimes.
Where I used to work we used to put some stuff called "ultra seal" into the truck tyres never had a problem with balancing or such
In the sales patter it said would give increased fuel economy as once fitted and inflated to the right pressure the tyre would remain at that pressure
We actually got something like a 2% increase in economy and a
22% reduction in the number of punctures (the vehicles went on a lot of building sites to deliver/collect and empty portable toilets) Whether this was due to the ultra seal is debatable
My only reservation about using the stuff was in the demo we got the rep put an icepick type thing into the tyre )made a nice 1/4 inch hole) filled tyre with "ultra seal" rolled tyre around and inflated it great stuff no leak BUT a 1/4 inch hole would have damaged the cords so reducing the strength and no one would know till the tyre went Bang or possibly worse if you put the stuff in after, fine, you use it as an emergency get you home but if put in as a prevention how would you know your tyres damaged
I intend to use it on just one tyre at present - which has a very slight air leak (probably around the bead somewhere, or maybe valve seating). The tyre in question loses around 10 psi a month, so a little squirt of (now purchased) Slime, should do it (I hope).
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