Yes, tires again...

[Okki]

Goyo, did you get my PM?

Discoverer ATP has a slightly more aggressive thread pattern and shoulder compared to the AT/3. I was looking for the more aggressive look and thus did not really compare directly to the AT/3.

i ended up mainly comparing the Duratracs versus the ATP and the ATP's were cheaper and have a 50/55K warranty (can't remember of the top of my head which one of the two distances). So far they have been awesome in the rain, they are as quiet as the OEM tires and I love the look. In two weeks they will get their first offroad use at the FJ Summit and a 3000 mile round trip highway distance.

So far very happy with my choice.

Okki

 

[Acidmeld]

I've found tire noise to be fairly controllable with air pressure adjustment. At 34psi my duratracs are loud, but at 38psi they are quiet as a mouse. I run mine at 36 tho to get the best treadwear and it only has a slight hum. I am admittedly only at around 3k miles on them so far so I expect more noise eventually. I'll adjust for that when it happens.

 

[Ramzey28]

I have run cooper atr which were louder then the revos that I ran before and now the firestones. No doubt they are not LOUD but based on the ATR and a work truck that has at3's on it (not a daily driver), Im just saying... IMO, the revos might be quietier then the at3's.... Everyone has opinions, and suggestions...dont freak out if you disagree. The sound could travel different on different vehicles too....who knows.

 

[DannyLlama]

I have run cooper atr which were louder then the revos that I ran before and now the firestones. No doubt they are not LOUD but based on the ATR and a work truck that has at3's on it (not a daily driver), Im just saying... IMO, the revos might be quietier then the at3's.... Everyone has opinions, and suggestions...dont freak out if you disagree. The sound could travel different on different vehicles too....who knows.

Thanks for the clarification.. Not freaking out, simply read information that was otherwise. you did mean AT3 and not ATR, correct?

 

[Goyo]

Thank you all for your input, advice, and experiences !!!

The are all greatly appreciated !!! And, still undecided...

1.) Good balance on and off road.
2.) Good on rain.
3.) Aggressive looks.

Cheer s!!!

G

 

[Wonderbreadman]

just bought and am installing monday morning a set of stock size nitto terra grapplers... let you know what I think of them soon. looking forward to loosing these stock pos tires bigtime

 

[Yeager_22]

Yokohama Geolander ATS would certainly fit the bill as well. I had them on both stock size and 285s, no issues. After torturing my Duratracs I always recommend them though, killer tire.

Good to hear about the DuraTracs!! I'll be buying them sometime next week. going with 285/70/r17 for my 03 4R

 

[brockeverly]

I've found tire noise to be fairly controllable with air pressure adjustment. At 34psi my duratracs are loud, but at 38psi they are quiet as a mouse. I run mine at 36 tho to get the best treadwear and it only has a slight hum. I am admittedly only at around 3k miles on them so far so I expect more noise eventually. I'll adjust for that when it happens.

You should be at 42-44psi on a stock sized LT tire to keep the same load rating IIRC.

 

[scanny]

You should be at 42-44psi on a stock sized LT tire to keep the same load rating IIRC.

You don't need to match stock tires max load, as per manual your tire must to support minimum 1719.5 lbs for GVWR 6295lbs (for SR5). LT tires do that a little under 35 psi for stock size. If you load your vehicle over GVWR then of course you'll need to bump pressure to support more weight, but it's not a good idea to go over GVWR anyway. At 42 psi LT tires stock size can support something about 2100 lbs per tire or 8400 lbs in total. You'll need that pressure if you load 2000 lbs over max recommended 1155 lbs load.

 

[Acidmeld]

You don't need to match stock tires max load, as per manual your tire must to support minimum 1719.5 lbs for GVWR 6295lbs (for SR5). LT tires do that a little under 35 psi for stock size. If you load your vehicle over GVWR then of course you'll need to bump pressure to support more weight, but it's not a good idea to go over GVWR anyway. At 42 psi LT tires stock size can support something about 2100 lbs per tire or 8400 lbs in total. You'll need that pressure if you load 2000 lbs over max recommended 1155 lbs load.

Agree with this just adding to it. 34psi is about minimum for duratracs on the 4th gen. I run 36-37 depending on load. I always have ~100lbs of gear in the cargo area so I adjust for that. I've also found that going under 35 psi creates more noticeable tire noise. Above 36 mine are very quiet.

 

[JB.]

You don't need to match stock tires max load, as per manual your tire must to support minimum 1719.5 lbs for GVWR 6295lbs (for SR5). LT tires do that a little under 35 psi for stock size.

And the stock tire does it around 20psi which is well below the tpms triggering point and also well below, I'll assume, where most people would be comfortable. In other words, more context is needed.

If you load your vehicle over GVWR then of course you'll need to bump pressure to support more weight, but it's not a good idea to go over GVWR anyway. At 42 psi LT tires stock size can support something about 2100 lbs per tire or 8400 lbs in total. You'll need that pressure if you load 2000 lbs over max recommended 1155 lbs load.

Sampling <a href="http://www.toyota-4runner.org/444428-post14.html" target="_blank">various</a> OE tire load reserves at GVW seems to indicate that industry practice is to provide a minimum of around 15% reserve at maximum loading with something around 25-30% seeming to represent an average. Interestingly, the 15% minimum receives support from <a href="http://en.allexperts.com/q/Tires-2359/2012/6/tyre-loadings.htm" target="_blank">this</a> tire engineer comment: "I think tires should not be loaded to more than 85% of their rated capacity when the vehicle is fully loaded".

Using your GVW number and then 15% as minimum reserve, puts pressure at 40psi for LT265/70/17.

All tires are not equal, however, and load and speed capability aren't completely separate properties. I doubt any OE tire is Q speed rated. Duratracs are, and that LT tire, in particular, would seem to be a good candidate for receiving the full 12psi adjustment, especially in a hot climate.

 

[brockeverly]

You don't need to match stock tires max load, as per manual your tire must to support minimum 1719.5 lbs for GVWR 6295lbs (for SR5). LT tires do that a little under 35 psi for stock size. If you load your vehicle over GVWR then of course you'll need to bump pressure to support more weight, but it's not a good idea to go over GVWR anyway. At 42 psi LT tires stock size can support something about 2100 lbs per tire or 8400 lbs in total. You'll need that pressure if you load 2000 lbs over max recommended 1155 lbs load.

I do not agree, nor do the engineers at Goodyear. This has been went over at length many times, but opinion is only that.

Here is some reading for you in the difference in an LT to a P rated tire. A search will yield many more results, as well as an email from Goodyear received by the late SeattleMike on the subject.

http://www.toyota-4runner.org/general-discussions/110299-lt-tires-need-more-air-pressure.html

 

[rebelbowtie]

Simply adding more tire pressure also isn't proper. I prefer to use the chalk test method

 

[brockeverly]

Simply adding more tire pressure also isn't proper. I prefer to use the chalk test method

I plan on this method to narrow down the pressures with and without my trailer on. Right now I have been simply winging it.

 

[BEAST-IV]

I have BFG All Terrain KO - 265/70/17 E-Rated tires. The tires are rated to 80 PSI, but I keep 38 PSI in them or they'd rattle my fillings out. MPG has also dropped substantially in the city and about 2-3+ MPG highway. Although I doubt I'll ever have to worry about a tire puncture, when I need tires again, I'll get a C or D rated tire instead. The extra tire weight is a bit hard on the pep and MPG, but they are just awesome in the dirt.

 

[JB.]

FWIW, the aforementioned tire engineer is not a fan of the chalk test.

He is apparently ok with a pressure rise test, though. I've used it a few times to give me some peace of mind when going fast in hot weather.

Tires: TIRE INFLATION VS. LOAD VS. TEMP, mile roundtrip, xj cherokee

 

[AnthonyMV]

Blackwall

Seems like there only is one tire that is true Blackwell on both sides. I think it's the khumo sat ??? My OCD doesn't like turning OWL tires on inside. And I don't like having to use Wesleys blech white to clean the outlined white letters or raised block letters.....more work to clean, more suck for life.

 

[scanny]

And the stock tire does it around 20psi which is well below the tpms triggering point and also well below, I'll assume, where most people would be comfortable. In other words, more context is needed.



Sampling <a href="http://www.toyota-4runner.org/444428-post14.html" target="_blank">various</a> OE tire load reserves at GVW seems to indicate that industry practice is to provide a minimum of around 15% reserve at maximum loading with something around 25-30% seeming to represent an average. Interestingly, the 15% minimum receives support from <a href="http://en.allexperts.com/q/Tires-2359/2012/6/tyre-loadings.htm" target="_blank">this</a> tire engineer comment: "I think tires should not be loaded to more than 85% of their rated capacity when the vehicle is fully loaded".

Using your GVW number and then 15% as minimum reserve, puts pressure at 40psi for LT265/70/17.

All tires are not equal, however, and load and speed capability aren't completely separate properties. I doubt any OE tire is Q speed rated. Duratracs are, and that LT tire, in particular, would seem to be a good candidate for receiving the full 12psi adjustment, especially in a hot climate.

Well, all I suppose that inflation tables show safe tire pressures, when I asked Goodyear and Toyota about proper LT tires inflation they both pointed me to the inflation tables. Nobody asked to add any percentage to it so I got an impression tha inflation tables include all neccessary safety margins. But anyway, GVWR 6295lbs + 15% = 7239.25lbs
C Load 256/70R17 @ 35 psi supports 1890 lbs per tire or 7560 lbs for 4 tires.
If you want 30% then you need to run 40 psi - it won't hurt except probably a little bit uneven wear on tires.

Another thing is that how often you load your truck up to the limit? I guess most of the time my 36-37 psi is overkill.

 

[scanny]

I do not agree, nor do the engineers at Goodyear. This has been went over at length many times, but opinion is only that.

Here is some reading for you in the difference in an LT to a P rated tire. A search will yield many more results, as well as an email from Goodyear received by the late SeattleMike on the subject.

http://www.toyota-4runner.org/general-discussions/110299-lt-tires-need-more-air-pressure.html

I have asked Goodyear, they send my inflation tables with my size tires higlighted. Never old me to add any percent to the values. I even posted it on this forum somewhere.
So I guess we are arguing about how much % over inflation tables values is safe. I think 15% is more than reasonable without copromising traction which comes to 36-37psi for LT stock size. I guess it just people opinions, I haven't seen anyting from tire manufactures about that.

 

[psiems]

I own a 2012 4runner and quickly got rid of the factory installed Bridgestone Dueler tires it came with. I purchased a set of Duratrac's (E rated, mostly because I wanted true black wall tires, although the stiffer sidewall helps). I love these tires. They are very aggressive looking and are reasonably quiet, considering the aggressive tread pattern. The tires grip on most any surface! The Discount Tire shop in my area bought my dueler's, which helped reduce the overall purchase price on the Duratrac's. Hope this helps!