User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 10-17-2019, 08:15 PM #31
Jivewalker's Avatar
Jivewalker Jivewalker is offline
Member
 
Join Date: Jul 2012
Location: Charleston, SC
Posts: 396
Jivewalker has a spectacular aura about Jivewalker has a spectacular aura about Jivewalker has a spectacular aura about
Jivewalker Jivewalker is offline
Member
Jivewalker's Avatar
 
Join Date: Jul 2012
Location: Charleston, SC
Posts: 396
Jivewalker has a spectacular aura about Jivewalker has a spectacular aura about Jivewalker has a spectacular aura about
Quote:
Originally Posted by Ryan1975 View Post
Lowered mine to 10psi for last March’s Bomb Cyclone
Don't like seeing that your 2012 tE is gone! But glad to see it's not forgotten! Love mine, Black Betty rocks on with 182k so far!
__________________
2012 TE w/ KDSS, Black, 265/70R17 C KO2's, 186,000 miles

Inside Fishing Rod Holder Mod
Jivewalker is offline   Reply With QuoteReply With Quote
Old 10-17-2019, 08:25 PM #32
DAW89446 DAW89446 is offline
Member
 
Join Date: Aug 2019
Location: Nevada
Posts: 109
Real Name: Dave
DAW89446 will become famous soon enough
DAW89446 DAW89446 is offline
Member
 
Join Date: Aug 2019
Location: Nevada
Posts: 109
Real Name: Dave
DAW89446 will become famous soon enough
Quote:
Originally Posted by Jivewalker View Post
I also think there is some thought that needs to be put into whether LT tires are the right choice. If you think about it, the higher psi gives a harsher ride and more jarring and wear on suspension components. Is it wort the trade off if you don't also upgrade the suspension to handle the increase in harshness? Or, is it better to get some beefy P rated all terrains, if they even exist. Then you could have the more flexy cushion of air between the trail/road and the suspension? Maybe its all bullshit piss ant stuff and I'm overthinking it, but it does make some sense. 40 is doing great for me right now with the KO2's, would love to slap some P rated tires back on at 32psi just to see the difference. I may even take the KO2's up to the recommended 44psi just to check it out like others have.
I considered if 10 ply E rated tires were overkill, vs. 6 ply C rated. But two things swayed me 10 ply. A. Price. There was little difference in price between the two as quoted by my local dealer. And B. Dirt roads and trails. Where I live, miles and miles of maintained are regularly used. When hunting and off roading for pleasure, there is lots of decomposed granite, sharp bedrock and other obstacles.

Since the 4Runner is relatively heavy, the better value for me is an E rated tire.
__________________
Dave
~When You Live in Nevada, "just down the road" is anywhere in the line of sight within the curvature of the earth.

2018 4Runner SR5
2012 Subaru Outback Premium
DAW89446 is offline   Reply With QuoteReply With Quote
Old 10-17-2019, 08:52 PM #33
Ryan1975's Avatar
Ryan1975 Ryan1975 is offline
Senior Member
 
Join Date: Dec 2010
Location: Monument / DTC
Posts: 1,245
Real Name: 2016 Member of the Year
Ryan1975 will become famous soon enough
Ryan1975 Ryan1975 is offline
Senior Member
Ryan1975's Avatar
 
Join Date: Dec 2010
Location: Monument / DTC
Posts: 1,245
Real Name: 2016 Member of the Year
Ryan1975 will become famous soon enough
Quote:
Originally Posted by Jivewalker View Post
Don't like seeing that your 2012 tE is gone! But glad to see it's not forgotten! Love mine, Black Betty rocks on with 182k so far!
2016 with 107k
__________________
Ryan - KC2VQG
- 2016 4Runner TEP Black
Gone but not forgotten...
- 2012 4Runner Trail Edition Black
- 2008 4Runner V8 Sport Edition Black
Ryan1975 is offline   Reply With QuoteReply With Quote
Old 10-22-2019, 12:25 AM #34
AK Mule's Avatar
AK Mule AK Mule is offline
Member
 
Join Date: Oct 2011
Location: Alaska
Posts: 49
AK Mule is on a distinguished road
AK Mule AK Mule is offline
Member
AK Mule's Avatar
 
Join Date: Oct 2011
Location: Alaska
Posts: 49
AK Mule is on a distinguished road
Thank you

This is one of the most informed threads on tire pressure I have seen in a lot of years on any forum. I have applied some of the information here to other cars and trucks we have. Some of my thoughts:

1. Switching from "P" tires to "LT" tires is a significant difference in tire loads and capabilities. The door jam sticker is no longer relevant, even if you use the same size tire. If you change tire size or brand, more math and experimenting/guesswork is needed.

2. We changed out the 20 inch wheels and tires on our Limited for SR5 wheels and stock size tires, but kept "P" tires, so the door jam is still mostly relevant. Summer is "P" Bridestone and winter is "P" Blizzak. So, about 32 to 34 PSI. We have not changed to any "LT" tires...yet.

3. Here is the biggie: Regardless of the tire we use, temperature is very important along with load range. When I set my cold tires' pressure in my 60-degree garage at 32 for "P" or 44 for "LT", that is fine for now. Then I open my garage door and leave, and the temperature may be 50-70 degrees colder outside (I'm in Alaska). If I am driving in town, they stay very cold (or after work outside). If I get on the highway, they probably warm up some. Rule of thumb is lose 1 PSI for each 10 degrees of temperature. Take that into account when you set your tire pressure if Summer and Winter are very different. After being at work all day in winter, my 32 PSI is probably a lot lower when I hit the road.

I set my "P" tires for 32 PSI in the Summer and 38 PSI in the winter. If I had "LT" tires, I would set them around 40 PSI in Summer and 46 PSI in Winter.
__________________
MULE
AK Mule is offline   Reply With QuoteReply With Quote
Old 10-22-2019, 11:27 AM #35
jhguth jhguth is offline
Senior Member
 
Join Date: Dec 2015
Posts: 1,000
jhguth is just really nice jhguth is just really nice jhguth is just really nice jhguth is just really nice jhguth is just really nice
jhguth jhguth is offline
Senior Member
 
Join Date: Dec 2015
Posts: 1,000
jhguth is just really nice jhguth is just really nice jhguth is just really nice jhguth is just really nice jhguth is just really nice
What are you over inflating them in winter, that seems almost opposite of what you would want
jhguth is offline   Reply With QuoteReply With Quote
Old 10-23-2019, 10:36 AM #36
AK Mule's Avatar
AK Mule AK Mule is offline
Member
 
Join Date: Oct 2011
Location: Alaska
Posts: 49
AK Mule is on a distinguished road
AK Mule AK Mule is offline
Member
AK Mule's Avatar
 
Join Date: Oct 2011
Location: Alaska
Posts: 49
AK Mule is on a distinguished road
Quote:
Originally Posted by jhguth View Post
What are you over inflating them in winter, that seems almost opposite of what you would want
Because at negative 20 degrees outside, the pressure quickly drops to where it should be or lower. I set the PSI in the garage; I drive outside. From my garage to the outside can change the pressure almost 10 PSI down.
__________________
MULE
AK Mule is offline   Reply With QuoteReply With Quote
Old 10-23-2019, 11:09 AM #37
1jzgte 1jzgte is offline
Member
 
Join Date: Oct 2016
Location: UTAH
Posts: 761
1jzgte will become famous soon enough
1jzgte 1jzgte is offline
Member
 
Join Date: Oct 2016
Location: UTAH
Posts: 761
1jzgte will become famous soon enough
Quote:
Originally Posted by jhguth View Post
What are you over inflating them in winter, that seems almost opposite of what you would want
The guy lives in AK
1jzgte is offline   Reply With QuoteReply With Quote
Old 10-24-2019, 02:01 PM #38
Garwel Garwel is offline
Junior Member
 
Join Date: Mar 2012
Location: Canada
Posts: 2
Garwel is on a distinguished road
Garwel Garwel is offline
Junior Member
 
Join Date: Mar 2012
Location: Canada
Posts: 2
Garwel is on a distinguished road
FYI and FWIW I went to the BFG website and hit the chat with us icon and had the following conversation:

Porter T (10/24/2019, 2:53:15 PM): Hello, I'm Porter How Can I help you?
(10/24/2019, 2:54:04 PM): for All-Terrain T/A® KO2 your site says a pressure increase to 44psi but my 4runner manual says 32, which do i use ?
Porter T (10/24/2019, 2:55:38 PM): Use the 44 PSI. Since the KO2 is a bigger tire, it will require more air. the vehicle most likely came with a P metric, smaller tire thus the lower PSI. But since you changed to LT, thus you raise the PSI.
(10/24/2019, 2:55:52 PM): ok ty
Garwel is offline   Reply With QuoteReply With Quote
Old 10-24-2019, 03:46 PM #39
AK Mule's Avatar
AK Mule AK Mule is offline
Member
 
Join Date: Oct 2011
Location: Alaska
Posts: 49
AK Mule is on a distinguished road
AK Mule AK Mule is offline
Member
AK Mule's Avatar
 
Join Date: Oct 2011
Location: Alaska
Posts: 49
AK Mule is on a distinguished road
Quote:
Originally Posted by Garwel View Post
FYI and FWIW I went to the BFG website and hit the chat with us icon and had the following conversation:

Porter T (10/24/2019, 2:53:15 PM): Hello, I'm Porter How Can I help you?
(10/24/2019, 2:54:04 PM): for All-Terrain T/A® KO2 your site says a pressure increase to 44psi but my 4runner manual says 32, which do i use ?
Porter T (10/24/2019, 2:55:38 PM): Use the 44 PSI. Since the KO2 is a bigger tire, it will require more air. the vehicle most likely came with a P metric, smaller tire thus the lower PSI. But since you changed to LT, thus you raise the PSI.
(10/24/2019, 2:55:52 PM): ok ty
The "P" to "LT" is correct, and a bigger tire will hold more air. More air (volume) is not more pressure, though. Actually, a bigger tire can have a larger load rating at the same pressure. It has more air (volume) to hold up the weight, and doesn't always need more pressure, if they are both "P" or both "LT". In this case, switching from "P" to "LT" is the reason for the pressure increase.

If you went from one size "LT" tire to a larger "LT" tire, you could decrease the pressure and have the same load rating because you have more volume. Volume is constrained by the size of the tire, pressure is not. Volume holds up the truck, not just pressure.
__________________
MULE

Last edited by AK Mule; 10-24-2019 at 03:50 PM.
AK Mule is offline   Reply With QuoteReply With Quote
Old 10-24-2019, 04:36 PM #40
YotaMD's Avatar
YotaMD YotaMD is offline
official vendor
 
Join Date: May 2017
Location: Colorado
Posts: 25
Real Name: Andy
YotaMD is on a distinguished road
YotaMD YotaMD is offline
official vendor
YotaMD's Avatar
 
Join Date: May 2017
Location: Colorado
Posts: 25
Real Name: Andy
YotaMD is on a distinguished road
Something interesting that came to light recently on my partially armored 100 series (around ~400# heavier than a 5th gen 4R) is that the KO2s at recommended 44 psi are noticeably harsh for my wife. She kept getting car sick on medium to long trips and then suddenly was better on our way home from a trail run where I only aired up to ~32 psi. Tires were more noisy, but my wife was totally fine.

I tested it a few times after where I'd modify the pressure without telling her and see if she noticed. I thought it was a placebo effect or something. I was wrong, she could tell every time I raised pressures and never complained with pressures set lower.

I would have sworn there was no perceptible ride quality difference between the E rated KO2 and my other tires, but my wife has proven otherwise...

I now run my KO2's at around 33psi. Happy wife, happy life.
__________________
Official YotaMD Store
We make highly refined remote cases featuring grade 5 Titanium. All made 100% in the USA.

YotaMD is offline   Reply With QuoteReply With Quote
Old 10-24-2019, 06:05 PM #41
jhguth jhguth is offline
Senior Member
 
Join Date: Dec 2015
Posts: 1,000
jhguth is just really nice jhguth is just really nice jhguth is just really nice jhguth is just really nice jhguth is just really nice
jhguth jhguth is offline
Senior Member
 
Join Date: Dec 2015
Posts: 1,000
jhguth is just really nice jhguth is just really nice jhguth is just really nice jhguth is just really nice jhguth is just really nice
Quote:
Originally Posted by AK Mule View Post
The "P" to "LT" is correct, and a bigger tire will hold more air. More air (volume) is not more pressure, though. Actually, a bigger tire can have a larger load rating at the same pressure. It has more air (volume) to hold up the weight, and doesn't always need more pressure, if they are both "P" or both "LT". In this case, switching from "P" to "LT" is the reason for the pressure increase.

If you went from one size "LT" tire to a larger "LT" tire, you could decrease the pressure and have the same load rating because you have more volume. Volume is constrained by the size of the tire, pressure is not. Volume holds up the truck, not just pressure.
That's not how tires work.

Also you could definitely require a different pressure changing LT tire sizes depending on the load index.
jhguth is offline   Reply With QuoteReply With Quote
Old 10-25-2019, 10:03 AM #42
Vwright14's Avatar
Vwright14 Vwright14 is offline
Member
 
Join Date: Sep 2014
Location: Bunker Hill, Wv
Posts: 421
Vwright14 is on a distinguished road
Vwright14 Vwright14 is offline
Member
Vwright14's Avatar
 
Join Date: Sep 2014
Location: Bunker Hill, Wv
Posts: 421
Vwright14 is on a distinguished road
One of our Tire Reps recently went to a BFG/Mich tire testing expo and they actually talked about this. They asked all the attendee's if they went up in tire size and to a LT rated tire, if the stock pressure was 36ish psi where would they typically run the new LT tire....they all pretty much answered lower psi...and were promptly told that was incorrect. They now recommend MORE....they said it was to give the tire the proper footprint, but im still not sold on it lol
__________________
2012 Salsa Red Trail with KDSS
5100's with lift,285/70/17 Duratracs,some extra wattage and speakers in the stereo system.
2003 Chevy Tahoe 4x4 - 20in OE Concepts,MAC Exhaust, soon to be lowered with 3k watts of stereo.
Vwright14 is offline   Reply With QuoteReply With Quote
Old 10-25-2019, 10:42 AM #43
DurangoMax DurangoMax is offline
Member
 
Join Date: Oct 2016
Location: Durango, CO
Posts: 46
DurangoMax is on a distinguished road
DurangoMax DurangoMax is offline
Member
 
Join Date: Oct 2016
Location: Durango, CO
Posts: 46
DurangoMax is on a distinguished road
Running 40 PSI

I have had my BFG AT K02s (265) on for 3 years (55K miles) and have kept them close to 40 psi. Tried a bit higher and that was too stiff and tires wanted to wander a bit) have also run them lower which is great on trails but too squishy (for me) at highway speed. 40 is the sweet spot for my daily use
__________________
'16 4Runner Trail w/KDSS Barcelona Red, N-Fab Nerf Bar, BFG AT K02
DurangoMax is offline   Reply With QuoteReply With Quote
Reply

Tags
inflation , pressure , raise , site , tire

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Mildly interesting: This site has more trackers than any site I've ever seen rob_dixon Off Topic 4 08-31-2019 03:31 AM
Interesting Used Parts site. SilverRidgeRunner1 3rd gen T4Rs 12 01-08-2016 10:51 PM
Interesting site on oil quality... jwyshrek Off Topic 0 01-20-2014 12:24 PM
Tire Pressure Sensor - Spare tire Tdub 4th Gen T4Rs 3 09-01-2008 10:49 AM
Tire Pressure & Max Rated Tire Pressure Phil 4th Gen T4Rs 7 03-10-2004 10:49 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 02:32 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Copyright © 2019


Garage Plus vBulletin Plugins by Drive Thru Online, Inc.