Tall Skinny Tire?

Antichrist

Expedition Leader
9.00x16 Co-op Grip Spur available at your local farmers cooperative. Approximately 36" OD

gripspur.JPG
 

jh504

Explorer
Actually, if it were possible for it to hold the weight/stress sufficiently, yes. The thing with narrow tires is that it increases the PSI (pounds per square inch) on the contact pattern. Think about a wide tire having a contact of maybe 12 inches wide by 2 inches long, that's 24 square inches to spread out your (lets say you have 2000 pounds sitting on each tire) weight on. Then put that on a 2 inch wide by 2 inch long contact pattern, that's only 4 inches to spread out the weight on. Without doing any big math, you can see that the PSI in the latter case is 6 times more!

Also, for places like sand or shallow snow, think "pizza cutter", with the high PSI it sinks right to the "hard" ground/surface/road underneath.

Yes, narrow tall tires look absolutely horrible, but function better.

Seems like another thread is going on with just this debate. If anyone made a 2" wide tire, of course the PPSI is going to be higher but that tire would be useless. You have to be able to grab a hold to the surface without just cutting it like a skill saw.
 

jh504

Explorer
The tire shop down the road from me gets 33x9.50s in a lot but I cant remember what brand they are. They are only$500 brand new. I can check if you want to go down to 33s.
 

4Rescue

Expedition Leader
9.00x16 Co-op Grip Spur available at your local farmers cooperative. Approximately 36" OD

gripspur.JPG
:drool: Now those are some neat looking tires...

And for the guy who thinks wide tiores are better... If so, why do Tractors run tall skinny tires??? Yes, for YOU in deep sand wide tires have their advantages... BUT in nearly EVERY SINGLE other terrain (outside of deep mud and snow) the tall skinny tires will go farther adn handle better.

Cheers

Dave
 

Pest

Adventurer
I am sorry but I must disagree it totally depends on your vehicle and driving terrain. Google may have it right but my right foot on the gas will always tell me wider is better. If you are talking about a small tacoma okay but a rig loaded with gear I just don't buy it. I would run 9.50 on my jeep but it weighs 3000lb about 1/3 of my truck.

Guess you missed the very first sentence of my post saying "...IF it were possible to support the weight/stress..."



Seems like another thread is going on with just this debate. If anyone made a 2" wide tire, of course the PPSI is going to be higher but that tire would be useless. You have to be able to grab a hold to the surface without just cutting it like a skill saw.

I have never seen rubber cut through rock, have you?
 

matt s

Explorer
I just started running the 33x9.5 bfg AT 's and love them. My full size blazer drives much better now. Previously it had 32x11.5 on it and was just not fun to drive.

I cannot comment on traction offroad, but do know from experience that wide just doesnt work well up here in the snow. The most popular size at the tire shop is 235/85/16's which are almost the same as my 33x9.5 r 15's mine are just slightly taller.
 

michaelgroves

Explorer
Actually, if it were possible for it to hold the weight/stress sufficiently, yes. The thing with narrow tires is that it increases the PSI (pounds per square inch) on the contact pattern. Think about a wide tire having a contact of maybe 12 inches wide by 2 inches long, that's 24 square inches to spread out your (lets say you have 2000 pounds sitting on each tire) weight on. Then put that on a 2 inch wide by 2 inch long contact pattern, that's only 4 inches to spread out the weight on. Without doing any big math, you can see that the PSI in the latter case is 6 times more!

The PSI is pretty much entirely dependent on the air pressure in the tyre, not the nominal dimensions of the tyre. I.e. if you have 20psi in any tyre, with a load of 2000lbs, it will spread that tyre over 100 square inches. Of course, what I am saying doesn't hold at the extremes, but in principle, if the wide tyre you refer to has a footprint of 12" x 2", then the narrow one will will have a footprint of 2" x 12", given the same load and air pressure. I wrote up something more comprehensive to this effect in the other thread currently discussing this same issue: http://expeditionportal.com/forum/showpost.php?p=452192&postcount=52
 

jh504

Explorer
:drool: Now those are some neat looking tires...

And for the guy who thinks wide tiores are better... If so, why do Tractors run tall skinny tires??? Yes, for YOU in deep sand wide tires have their advantages... BUT in nearly EVERY SINGLE other terrain (outside of deep mud and snow) the tall skinny tires will go farther adn handle better.

Cheers

Dave

Hey 4Rescue, was your response directed towards me? If it was I am an advocate for narrower tires, so I think it was misdirected.

Originally Posted by bat





Quote:
Originally Posted by jh504
Seems like another thread is going on with just this debate. If anyone made a 2" wide tire, of course the PPSI is going to be higher but that tire would be useless. You have to be able to grab a hold to the surface without just cutting it like a skill saw.

I have never seen rubber cut through rock, have you?

I agree that narrower tires are a better all around tire and deliver better traction in a lot of situations. But simply saying that the "narrower the better" and a 2" tire would be good for a 5,000lb offroad rig is off base. This is a variable subject that depends on a lot of different factors. Others here have put it much better than me. PPSI is not the only issue when offroading. Once a tire reaches a certain height to width ratio it becomes more and more unstable side to side. I dont see many professional rockcrawlers using what would be considered narrow tires. They dont use extremly wide tires either, but if a 35x9.50 was the best solution for them then they would be using it.

>>>Maybe we should take this discussion to the other thread, since this thread was started by someone who already knows he wants narrow tires.
 
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EXP-T100

Adventurer
I like the Co-Op Grip Spur but it look like it would be really loud and ware fast. Where as the Superlug is aggressive but with a titer tread for a more friendly ride.
 

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Larry

Bigassgas Explorer
I am a firm believer of tall skinny tires and wouldn’t run anything else for an off-road rig.

Here is mine with Super Swamper TSL Q78 X16. It is a great tire that quickly changes personalities with simple air pressure adjustments. I wish I could find an All-Terrain tire in this size as well. You would be surprised how well this big old heavy truck handles on the highway with these tires and how it well it works in the snow, mud, desert, and sand. Of my circle of friends that run the common 35x12.50’s I am not the one that has issues getting around when the trail surface gets challenging.

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Another view while airing up before getting on the highway after leaving Toroweep

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Another advantage, on my body style truck anyway, is the fact the tall skinnies don’t rub the fenders when the suspension is fully articulated plus you don't need a red neck style ten foot tall lift kit to run these tall skinnies.

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My 2005 Silverado 2500HD with Cooper Discoverer S/T 255/85R16’s. Skinny, but not as tall as I would like for a full size rig.

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