Tire ideas

[redshift]

Originally Posted by BrianG

What's_nitro: I did think of that. Basically, put in a few sheets of f-glass cloth and then enough f-glass resin to liberally coat the inside of the tire and spin in continuously until it cures. That should provide a nice 1/16"-1/8" thick coat of resin to stiffen the whole tire without adding as much weight as totally filling it.

I also thought about getting some plastidip (in a can, not the spray) and pouring it in there, but I don't think it will ever harden. I need something that needs to be mixed so it cures via chemical reaction rather than air-dry seeing as it will be contained inside the tire and airflow is minimal if any.

Even if you were able to distribute the resin or whatever evenly, you'd still have flimsy sidewalls. That would mean still running foams or using sprayfoam, both of which I think the point here is to avoid. Sprayfoam would probably require at least 4 holes inside the rim to get close to even, unless it was done first as mentioned. Still there is almost no way you'd be able to have both a balanced wheel and one that runs true... it seems to me. Balancing would be more difficult with either of the above ideas, I think, than it would be to do the old way. I've given quite a lot of thought to this and keep coming up empty.

Now if someone could make a sub-carcass type of molded piece that the tire glued onto completely (or almost completely) and then the tire & molded carcass assembly was glued onto the rim, maybe that would be something. Need something like thin lexan, but something that would not be attacked by the various glues.

And there would be many profiles for someone to have to mold for the various tire inners. The various shapes and sizes could be semi-universal I suppose but who is gonna invest in the idea......

Really shouldn't be this difficult

[Bondonutz]

OBTW, If you decide on mounting your own tires The nylon reinforced packing tape is the best thing to line insides of tires with hands down.
The name brand premounts are of awesome qaulity as well, the molded foams are the cats meow on and off the track. But pricey $$$

[BrianG]

Ideally, I'd like to find a solution that would work with any tire, hence the liquid pouring thing. Weight would be a big concern though, so foam is the next logical choice. But foam isn't dense enough to keep the sidewalls from contracting (which they have to do when the tire balloons).

Maybe instead of simply spinning the tire (making the sidewalls still flex), spin the tire on a strong wobble. That would coat the sidewalls and tread fairly evenly. But really, if the tread was more solid, they wouldn't balloon, which is what I believe helps tear the tire from the rims.

[redshift]

Few things to throw in, I've read about people trying an external belt type thing. And I've also seen where the tire rips through the inside of the weave and just shreds itself.

So maybe we are trying to address the tire issue too much and ignoring other possibilities. The best quick solution I have would be to take some molded foams (and they must be very close to the profile of your tire inner) and glue them to the rim.

Then take some fiber tape and (loosely) wrap a few turns around the outside of the foam, where it is more or less flat across, then gluing the tire (possibly Gorilla glue, or similar) to the foam.

With the right glue you'd have some movement while the tire was being glued to the rim. One or two small air holes, and the glue should cure within a few days at the most.


Actually that needs tweaking, maybe tape around foam first (so you can still get the foam into the tire easily), then glue the foam, taped, inside the tire, get it nice and straight, and let it dry. Then glue the inside of the foam to the middle of the rim while gluing the tire bead to the rim.

Best I got at the moment....

[PBO]

Personally, I'd love some belted Truggy tyres

I have a couple of sets of Truggy premounts & they are very durable, foam for on roads are equally impressive if you buy name brand

Expanding foam is the devils work, it absorbs water & the cells break down on impact which means the inside would either turn to firmish mush or liquid mush depending on how they were treated

I have experience with exotic ropes (dyneema, sk75, pbo, kevlar etc) & I was thinking of wrapping the wheel in closed cell foam - like inserts & wrapping that with unlayed rope fibres, then gluing...if it works the way I hope, I'll be happy to share with pics & instructions

[simplechamp]

Originally Posted by BrianG

I also thought about getting some plastidip (in a can, not the spray) and pouring it in there, but I don't think it will ever harden. I need something that needs to be mixed so it cures via chemical reaction rather than air-dry seeing as it will be contained inside the tire and airflow is minimal if any.

I thought maybe if you wanted to use a compound that required air drying you could use a small aquarium air pump and tubing. The pump would blow air through the tubing into one of the wheel vents and it would escape from the other vent. Constant flow of air to cure the plasty-dip.

However figuring out how to make this work while the tire is rotating? That's another story...

[Gee]

Make an inner tube out of condoms. I got some I'm done with. lol

[nitrostarter]

Hope you fired blanks tho... Otherwise, may cause balance problems.