Hi I live in the philippines too and these are fine tires.
They are 8-10 ply construction LT tires and require high pressures on the road or the sidewalls will indeed weaken and crack. My LT265/75R16 are 10 ply. I have to run 42-44 psi (cold) on my HDj80 landcruiser.
What I learned recently researching about LT tires:
An LT tire is nothing like a regular passenger tire. You can blow up a balloon with your mouth for it to reach its intended shape (round). How much psi is that? Not
much. But you cannot blow up a basketball without a pump. More psi. The much thicker rubber in an LT tire takes more psi for it to attain its intended shape i.e. a flat
tread surface, under a given load. So, for a given load, say a stock landcruiser, a OEM b-stone dueler HT will need 32 psi to achieve its flat tread while a 10 ply LT will need much
more, say 40 psi, to achieve a flat tread. Do not make the false assumption that the contact patch (length of footprint) for the LT tire at 40 psi is smaller than the 32 psi Dueler; if they are both at their equilibrium pressures, the contact patch should be comparable.
Now a dueler HT inflated to 40 psi will make your fillings fall out if it doesn't explode first (my bet's that it explodes), but the LT tire is at its intended
equilibrium at that pressure and the ride (given sufficient load) is not as bad as you would think because it's not a passenger type tire. It will be harsher than a
b-stone HT set at 32 psi, but not as much as you think. And as the load increases, the difference diminishes. So if you have a hi-lux (compact toyota pick-up) with the same 10 ply tire set
at it's equilibrium pressure of maybe 36 psi, the ride will be harsher than the LC set at 40 psi. So a 6 or 8 ply LT tire might be preferable (from a ride and
handling standpoint) for a pick-up.
Forget about the pressures in your owners manual, except as reference to calculate your estimated pressure for your LT tires. These numbers are for passenger type
tires. Underinflation of a LT tire will result in premature wear, high fuel consumption (especially for MTs), sloppy steering, and a weakened/damaged sidewall which
can potentially fail. 2 or 3 ply LT sidewalls retain heat generated at high speeds much more than passenger tires. See below excerpt from an oz mag article:
"When a tyre runs at a pressure too low, it causes flex in the sidewall in a concentrated zone. This flexing action causes friction in the various materials of the
sidewall and creates a band of excess heat along this point.
The heat build-up can quickly deteriorate the rubber in the sidewall and cause it to blister. The tyre literally starts to destroy itself from the inside out while
there is very little visual evidence of this. This action compounds as speed increases."
"So what is the right pressure? After extensive testing in Australian conditions, the people at Bridgestone formulated a rule of thumb for optimum on-road tyre
pressures.
Inside the driver’s door well there is a placard displaying the manufacturer’s recommended tyre pressure. Accounting for Australian road conditions and the continual
variance in the load your vehicle carries, Bridgestone's recommendation is 10 percent above what the placard reads. If your pressures are under the placard’s figure
then you’re underinflated.
Recommended tyre pressures are calculated on a cold tyre (25°C ambient temperature and out of direct sun), so the best bet is to check pressures in the morning
before driving."
Note that the above advice from b-stone did not even specify LT tires, it was given for their truck tires in general. BFG, as a rough recommendation, recommends a increase of 8-10 psi over the pressure spec in the owners manual when switching to their 8-10 ply AT or MTs.
A more precise way to determine correct pressure is given in the oz landcruiser lcool forum as follows:
"A subject which often pops up is the correct road tyre pressure for our Cruisers.
Here's the deal.... Check the tyre pressure cold. Hit the road for half an hour, stop and check the tyre pressures. You're aiming for a 4psi pressure increase (due
to heat). This will give you the right pressure to run for your tyre/axle load and speed combination. If it's greater than 4psi, you need to run more pressure. If
less than 4psi, they're over inflated and you need to drop the cold pressure.
This may however not be the ideal pressure. You may for example increase the pressure by a couple of psi for sharper handling or decrease slightly for more comfort.
You may also use more pressure at the front to decrease the amount of understeer.
Stiff sidewall tyres such as the BFG will require quite high pressure compared to a road based tyres such as the GrandPuke. A stiff sidewall will generate more heat.
The general rule for road based tyres is to not exceed 36psi no matter what. With the 285/75x16 BFG, it's not uncommon to pump them up to 65psi when running fast and
heavily loaded. "
If you have MTs, you may want to run a little extra pressure because of the increased rolling resistance (poor fuel economy), improved handling (less tread squirm), and better wear (we want to preserve our valuable shoulder blocks for off-road traction!). Too much extra pressure and you compromise wet traction.
A final note: Some think that if they switch a larger tire (more air volume) then they need less pressure. I found out this is not necessarily so. The variances
caused by tire construction have a much larger influence on what the equilirium pressure is. Typical upsizing diameter of 2-3 inches did not make a significant
difference in what that pressure is. Also, variances occur from brand to brand. A Goodyear 10 ply rated MTR equilibrium pressure for a given load will be lower than that of a 10 ply BFG or Cooper.
-mkh
Rating: 8
Product Details: "Cooper Discoverer STT On / Offroad Tires" by Editor - posted: Wed March 5, 2008 - Rating: 7.26
Last Review Posted by Unregistered - posted: Mon July 6, 2009 12:24am
I've found that by changing the ID name to words you can text global with the rino 120. you need to be on the same channel and code on the radio with the radio part on and send location on in radio setup ,then key to send (NO texting charges apply at this time.) have free fun texting.
Overall this is a very good tire. I’ve beat the heel out of mine and they’ve never popped. I am talking about stuff like driving over train tracks and getting chased down the tracks by a mile long train, bouncing over the ties and spikes at like 30mph and jumping the rails. Any trail that’s already beaten these tires will get you through. Sand, snow, gravel whatever, not a problem. Good but not great in the mud. Stay out of the deep thick stuff with these tires because they don’t self clear.
Product Details: "TrXus STS All Terrain" by Editor - posted: Tue January 30, 2007 - Rating: 5.76
Last Review Posted by Unregistered - posted: Sat July 4, 2009 8:21pm
this tire grips amazing on rocks and mud so far was going forwards and reverse alot to turn around in very slick mud and they werent spining once just dont be dumb and make your owwn ruts and get stuck
Rating: 9
Product Details: "BFGoodrich All Terrain T/A KO Tire" by Editor - posted: Tue January 30, 2007 - Rating: 7.08
Last Review Posted by Unregistered - posted: Fri July 3, 2009 9:41pm
Let's see. There's a product that's been around for decades that can magically increase mileage by 20% or so, and no oil company has put it in their gasoline?
Can you imagine the profits of an oil company that can promise gasoline that gives 15-20% better mileage than their competition?
Sorry, does not pass the red-faced test. Just another gimmick.
Rating: 1
Product Details: "Syntek Engine Boost 2.0 Fuel Additive for Increased Fuel Mileage" by Editor - posted: Fri August 1, 2008 - Rating: 5.84
Last Review Posted by Unregistered - posted: Fri July 3, 2009 3:54am
Over all Best Bang for The Buck. Sold my last truck with its second set of T/Dgrs. Just about to Buy a New Set For My new truck. Great in The Mud Trails And Rock traction. Love these Damn Tires! Hwy noise is to be expected and is a low hum at that.
Rating: 10
Product Details: "Hercules Trail Digger M/T Tire" by Editor - posted: Thu June 26, 2008 - Rating: 8.68
