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Why don't we use tire compound on outdoor off-road?

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Why don't we use tire compound on outdoor off-road?

Old 07-20-2021, 08:53 AM
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Default Why don't we use tire compound on outdoor off-road?

As the title says: Why don't we use traction compound on outdoor off-road applications? Is it because it would cause dirt to stick to the tires? I know in on-road carpet, we use it and it actually helps keep the tires from getting junk stuck on them, but that is a whole different ball game. Just wondering why it isn't used in outdoor off-road.
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Old 07-20-2021, 09:03 AM
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We use it on clay.

I’ve not run on an outdoor dirt truck before. Carpet, clay and turf so far
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Old 07-20-2021, 10:01 AM
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Dirt would stick to it plus the way an off road tyre works is somewhat different to an on road tyre. An off road tyre has an actual tread pattern, which plays a huge role in the grip, not so much the rubber compound. And it would be impossible to get the compound on the tyre evenly due to the tread. Add to that a rough and loose surface, so what exactly are you gripping?
On a smooth road surface, with a smooth slick tyre, it's pretty much all rubber compound and no tread pattern for maximum grip, so sauce away......
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Old 07-20-2021, 01:51 PM
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Originally Posted by 0010 View Post
As the title says: Why don't we use traction compound on outdoor off-road applications? Is it because it would cause dirt to stick to the tires? I know in on-road carpet, we use it and it actually helps keep the tires from getting junk stuck on them, but that is a whole different ball game. Just wondering why it isn't used in outdoor off-road.
It MiGHT work for a fre seconds until the dust and rocks absorbs it all the way ... and then its useless.
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Old 07-20-2021, 08:04 PM
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Some guys claim certain cleaners make tires 'stickier' but yeah saucing a tire for true off road doesn't make sense.
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Old 07-20-2021, 08:11 PM
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Iíve run 1/10 and 1/8 on a sugared track. Not all tracks or tires are the same. But the ones I was running on were hard packed and sprayed with grape soda. The traction was awesome and fun but tire wear was excessive. I would rather run on a watered loamy track with pin tires that last more than one race day.
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Old 07-20-2021, 08:14 PM
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From what I can figure out, its because you already choose the right compound for the conditions. You rarely use a clay compound, most soft super soft or a long wear of some kind. So you don't need a tire sauce to make the tire grippier.

But some people do run tire sauce outdoors its just less aggressive stuff or different. Sticky kicks comes to mind, its kinda like water indoors. So theres always an exception to the rule.
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Old 07-20-2021, 09:38 PM
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Originally Posted by 0010 View Post
As the title says: Why don't we use traction compound on outdoor off-road applications? Is it because it would cause dirt to stick to the tires? I know in on-road carpet, we use it and it actually helps keep the tires from getting junk stuck on them, but that is a whole different ball game. Just wondering why it isn't used in outdoor off-road.
My understanding is that it all depends on the type of surface you run on and how the tyre generates grip.

Tyres develop traction via 3 mechanisms:
1) adhesion - stickiness of the tyre to a smooth surface
2) deformation - roughness of the surface digging into the tyre / tyre pins digging into the surface
3) destruction- it takes energy to rip the surface of the tyre / tyre ripping up the surface.

Smooth polished indoor clay works on 1) only, so having a super soft sticky compound works best.

Most outdoor tracks have more surface roughness / loose layer for the tyre to dig into rather than sticking to the surface, so 2) and 3) are the main ways it develops traction. The compound softness and hysteresis affects 2) a lot. You don't necessarily need a softer tyre as it can overheat and fold around reducing traction.

Some outdoor tracks we run on here are treated with vegetable oil to reduce dust and they end up polished and smooth. In these conditions we are running traction compound as the mechanism of developing traction is similar to indoor clay.

Hope this helps

Ray
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Old 07-21-2021, 07:59 PM
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Originally Posted by Billy Kelly View Post
We use it on clay.

Iíve not run on an outdoor dirt truck before. Carpet, clay and turf so far
how do you become a tech profit without ever running on an outdoor dirt track?
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Old 07-26-2021, 10:04 PM
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You can sauce for dirt or clay, but is more noticeable on clay. Dirt tends to separate and become loose on it's own, so even though the tires remain sticky, the terrain is loose and therefore the car can only bite onto the surface it's running on allows. Calcium can help dirt hold firmer like on clay, but it's not the same. Locally here we had a few pro drivers making their own sauces with substances such as diesel and cleansers mixed together in order to create a concoction that stayed on without falling off or fading. And then someone discovered that Liquid Wrench did the trick perfectly and you didn't need to smell like fuel all day to make your tires sticky.

Wat we do is mount and glue the tires down and a day or more before race day you spray the rubber down with liquid wrench and then set them out in the hot sun open for a couple hours and then in the bags for however longer you wanted them to bake. The end result was a pretty sticky tire and bit really hard. Ive done this with both Panther and JConcepts tires, and for those whom don't know, JConcepts tires aren't rubber while Panthers are genuine rubber, and it works just as well on both.

Hope this helps.
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Old 07-27-2021, 08:21 AM
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