50psi?? New LT265/60R18 BFG TA KO2 - Page 2 - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > 2014+ Jeep Grand Cherokee Ecodiesel 3.0

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #13  
Old 08-23-2015, 10:02 PM
WK2 Rover's Avatar
Premium Member
My Jeep: 2011 5.7L WK2
 
Join Date: Sep 2010
Location: San Francisco Bay Area
Posts: 282
Thanks: 2
Thanked 11 Times in 9 Posts
Rep Power: 2550
WK2 Rover is on a distinguished road
Re: 50psi?? New LT265/60R18 BFG TA KO2

How is the road noise with the KO2s? It is supposed to be fairly quiet, and I saw a YouTube video on a full-size pickup driving 80 MPH and he was pleased.

These tires are far superior off-road to any ATs we had to date, so no concerns about off-road or snow performance. They are the highest rated tires on TireRack, although with significantly less customer miles. And they are LTs!

The PSI being 50% higher is surprising because when I went from P-rated to LT-rated on my '93 Grand Cherokee I kept the stock 33 PSI and it seemed to run the same.

Please retry posting the pictures so we can see how the look on your WK2, thanks.

__________________
JEEP 3: 2011 Grand Cherokee Overland 4x4, Hemi V-8 with MDS, Multi-speed Automatic with ERS, Quadra-Drive II with Rear ELSD, Off-Road Adventure Group II, Selec-Terrain, Quadra-Lift, Towing Group IV, Advanced Warning & Adaptive Cruise Control, Bright Silver Exterior with Beige Leather Interior
MODS: All-Terrain tires, Passenger-side "Trail Rated" Badge, "5.7L" and "Hemi" Badges, "70th Anniversary" Badge, Mopar Cold Air Intake, Custom Engine Cover, Chrome Fog Light Bezels, Bright Pedals, Illuminated Door Sills, WeatherTech in front / back / cargo / license plate frame, Mopar Roof Rack, Thule Ski Rack, Thule MOAB Cargo Basket
JEEP 4: 2014 Cherokee Trailhawk 4x4, 3.2 liter V-6, 9-speed Automatic with ERS, Active-Drive II with Rear ELSD, Technology Group, Comfort Group, Cold Weather Group, Granite Exterior with Brown Interior
Reply With Quote
Sponsored Links
Advertisement
 
  #14  
Old 08-23-2015, 10:42 PM
Member
 
Join Date: Feb 2015
Posts: 44
Thanks: 1
Thanked 7 Times in 7 Posts
Rep Power: 693
Gs WK2 is on a distinguished road
Re: 50psi?? New LT265/60R18 BFG TA KO2

if this doesn't work, then can someone tell me how to post pics. I have it on my dropbox. As for noise, it seems to be obvious at slow speeds and when braking to a stop. Once I get some speed, I don't notice it anymore. Certainly not quite like the OEM Latitude.

https://www.dropbox.com/s/xaa97xly12...38.52.jpg?dl=0

https://www.dropbox.com/s/ca9va7slbl...38.39.jpg?dl=0
Reply With Quote
  #15  
Old 08-24-2015, 10:49 AM
WK2 Rover's Avatar
Premium Member
My Jeep: 2011 5.7L WK2
 
Join Date: Sep 2010
Location: San Francisco Bay Area
Posts: 282
Thanks: 2
Thanked 11 Times in 9 Posts
Rep Power: 2550
WK2 Rover is on a distinguished road
Re: 50psi?? New LT265/60R18 BFG TA KO2

The links to Dropbox work, thanks.


Sent from my iPhone using JeepGarage
__________________
JEEP 3: 2011 Grand Cherokee Overland 4x4, Hemi V-8 with MDS, Multi-speed Automatic with ERS, Quadra-Drive II with Rear ELSD, Off-Road Adventure Group II, Selec-Terrain, Quadra-Lift, Towing Group IV, Advanced Warning & Adaptive Cruise Control, Bright Silver Exterior with Beige Leather Interior
MODS: All-Terrain tires, Passenger-side "Trail Rated" Badge, "5.7L" and "Hemi" Badges, "70th Anniversary" Badge, Mopar Cold Air Intake, Custom Engine Cover, Chrome Fog Light Bezels, Bright Pedals, Illuminated Door Sills, WeatherTech in front / back / cargo / license plate frame, Mopar Roof Rack, Thule Ski Rack, Thule MOAB Cargo Basket
JEEP 4: 2014 Cherokee Trailhawk 4x4, 3.2 liter V-6, 9-speed Automatic with ERS, Active-Drive II with Rear ELSD, Technology Group, Comfort Group, Cold Weather Group, Granite Exterior with Brown Interior
Reply With Quote
  #16  
Old 08-25-2015, 04:43 AM
Member
My Jeep: 2015 3.0L WK2
 
Join Date: Feb 2014
Location: Tacoma, WA
Posts: 241
Thanks: 2
Thanked 23 Times in 19 Posts
Rep Power: 1254
MBDiesel is on a distinguished road
Re: 50psi?? New LT265/60R18 BFG TA KO2

How's the ride quality compared to the Michelins? Any fuel economy hit? These just came on my radar and I like the fact that they're LT but I don't want my fillings knocked out

Might go try them at Discount Tire and if I don't like them trade for some Michelin LTX's.
__________________
2015 WK2 EcoDiesel Overland 4x4 Billet Silver, ORAII, ATG
1990 Mercedes-Benz 300D 2.5 Turbo - 155k
No sparks allowed!
Reply With Quote
  #17  
Old 08-25-2015, 08:42 AM
Hutch801's Avatar
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Aug 2014
Location: Brisbane, QLD
Posts: 822
Thanks: 120
Thanked 137 Times in 113 Posts
Rep Power: 17331
Hutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond reputeHutch801 has a reputation beyond repute
Garage
Re: 50psi?? New LT265/60R18 BFG TA KO2

I would run no higher than 40 psi.


Hutch- 2014 GC Blackhawk CRD...Feel the Power...
__________________
Hutch: 2014 Grand Cherokee Blackhawk in Black of Course.....CRD Feel the Power..
Reply With Quote
  #18  
Old 09-11-2015, 11:06 PM
Member
 
Join Date: Feb 2015
Posts: 44
Thanks: 1
Thanked 7 Times in 7 Posts
Rep Power: 693
Gs WK2 is on a distinguished road
Re: 50psi?? New LT265/60R18 BFG TA KO2

Here is an update. It's a bit early to get an accurate MPG change with the KO2 but it appears to be a hit of 1.5 MPG. And they are louder than I was expecting.

Found a thread somewhere that pointed me to an educational site for calculating the true equivalent psi when changing from a P-metric to LT. Toyotires.com/tires-101. Anyway I now see where 50 psi came from but it looks like that is not accurate in that the conversion does not de-rate the OEM P-metric for SUV vehicle. Seems the true engineered LT load inflation for 119 load rating on LT is 45 psi. I suppose if I had a full cargo of 1,000 lbs or more I might go this high but think I will stick with 40 for now.

It's a good read for anyone who is interested in this topic.
Reply With Quote
The Following User Says Thank You to Gs WK2 For This Useful Post:
  #19  
Old 09-12-2015, 06:26 PM
Member
 
Join Date: Nov 2013
Posts: 157
Thanks: 63
Thanked 23 Times in 17 Posts
Rep Power: 1265
dsears00 is on a distinguished road
Re: 50psi?? New LT265/60R18 BFG TA KO2

Quote:
Originally Posted by Gs WK2 View Post
Here is an update. It's a bit early to get an accurate MPG change with the KO2 but it appears to be a hit of 1.5 MPG. And they are louder than I was expecting.

Found a thread somewhere that pointed me to an educational site for calculating the true equivalent psi when changing from a P-metric to LT. Toyotires.com/tires-101. Anyway I now see where 50 psi came from but it looks like that is not accurate in that the conversion does not de-rate the OEM P-metric for SUV vehicle. Seems the true engineered LT load inflation for 119 load rating on LT is 45 psi. I suppose if I had a full cargo of 1,000 lbs or more I might go this high but think I will stick with 40 for now.

It's a good read for anyone who is interested in this topic.

Yeah, first weekend with the KO2s and it looks like about a 1.5 mpg hit. Agreed they are louder I notice it most between 50-60 mph, but then the wind noise starts to drown it out.

I'm curious about the correct psi also. Started with 40, dropped to 38, but think 40 was probably better. Do you have a link to that site? I'd like to edumikate myself.


Sent from my iPhone using JeepGarage
Reply With Quote
  #20  
Old 09-12-2015, 06:36 PM
Member
 
Join Date: Feb 2015
Posts: 44
Thanks: 1
Thanked 7 Times in 7 Posts
Rep Power: 693
Gs WK2 is on a distinguished road
Re: 50psi?? New LT265/60R18 BFG TA KO2

https://www.toyotires.com/tires-101/...flation-tables

See if this works.
Reply With Quote
The Following User Says Thank You to Gs WK2 For This Useful Post:
  #21  
Old 09-13-2015, 10:25 AM
Member
 
Join Date: Nov 2013
Posts: 157
Thanks: 63
Thanked 23 Times in 17 Posts
Rep Power: 1265
dsears00 is on a distinguished road
50psi?? New LT265/60R18 BFG TA KO2

Quote:
Originally Posted by Gs WK2 View Post

Thanks... I find it interesting that the P rated chart for the P265/50R20 stock tire only goes up to 35 PSI (2094/1.1 for 1904), but jeep recommends 36 PSI. Now if I read that and understood it correctly, that means the tire's load does not increase with any additional PSI increase. Basically, it's maxed out at 35 PSI for that particular tire. I wonder why Jeep then recommends 36 PSI... maybe wear and ride characteristics. Of course I'm just armchair quarterbacking here and those guys are a lot smarter than me.

So what I came away with is the PSI for the LT275/55R20 tire should be about 39-40 PSI. I've increased mine back up to 40.

Sent from my iPhone using JeepGarage
Reply With Quote
  #22  
Old 09-14-2015, 12:44 PM
WK2Kev's Avatar
Premium Member
My Jeep: 2014 3.0L WK2
 
Join Date: Oct 2014
Location: Castle Rock, CO
Posts: 125
Thanks: 1
Thanked 17 Times in 16 Posts
Rep Power: 916
WK2Kev is on a distinguished road
Garage
Re: 50psi?? New LT265/60R18 BFG TA KO2

I am running 42 on my KO2's. Pumping up to 45.
Reply With Quote
  #23  
Old 09-15-2015, 08:28 PM
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Nov 2014
Location: SE Pennsylvania
Posts: 5
Thanks: 6
Thanked 2 Times in 1 Post
Rep Power: 752
rpmii is on a distinguished road
Re: 50psi?? New LT265/60R18 BFG TA KO2

How about 55 psi?

I contacted BFG customer support - even though they can't confirm my placard says to inflate P-metrics to 36 psi - here is their recommendation:

>>>>>>>
After review based on your vehicle, it shows that the recommneded pressure for the original equipment tires is 33 front and rear. In which case the recommended pressure would be 55 psi for the LT 265/60R18.
Please verify the psi at the door placard of your vehicle as we don't have a posi recommendation for 36 psi


We appreciate your business and thank you for choosing BFGoodrich.
Reply With Quote
  #24  
Old 09-15-2015, 10:44 PM
Member
 
Join Date: Feb 2015
Posts: 44
Thanks: 1
Thanked 7 Times in 7 Posts
Rep Power: 693
Gs WK2 is on a distinguished road
Re: 50psi?? New LT265/60R18 BFG TA KO2

Your placard has 36psi? What size tires do you have? My math shows P265-60R18 at 33psi has a TRA load inflation table of 2,200 lbs for the 109 load rating of the OEM tires. Taking this value straight to the LT table for 119 load rating is 50psi (2,205 lbs to be precise). But, when de-rating the P tire for SUV service by 1.10, the equivalent load is 2,000 lbs and 45 psi for LT.

I have been at 38psi lately as my butt index tells me it is better and I can justify based on gross axel weight rating and that I do not tow anything.


Sent from my iPad using JeepGarage
Reply With Quote
Reply

Thread Tools
Display Modes

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
BFG All-Terrain T/A KO2 Jeepman3ski Suspension/Driveline/Brakes/Wheels/Tires 26 12-02-2016 02:29 PM
2755/55r20 bfg ko2 kyecodiesel Suspension/Driveline/Brakes/Wheels/Tires 17 11-19-2016 08:26 AM
Tire Question, LT or 6 ply roughness? BFG KO2 SavageBrewer Suspension/Driveline/Brakes/Wheels/Tires 25 08-14-2016 12:35 PM
2011 Overland WK2 - BFG KO2 restored Suspension/Driveline/Brakes/Wheels/Tires 8 04-08-2015 02:05 PM
BFG T/A KO2 All Terrain Discount Tire Wheels and Tires 6 11-06-2014 05:24 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 02:48 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.