Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 

Go Back   Keystone RV Forums > Keystone Tech Forums > Tires, Tires, Tires!
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 04-28-2016, 04:59 PM   #21
gearhead
Senior Member
 
Join Date: Jul 2013
Location: Liberty, Texas
Posts: 5,021
So why are you wanting to run 100psi in a wheel that is only rated for 94? It isn't much over, but it's over. Why not run the tires at 94 or 90psi?
__________________
2018 Ram 3500 Laramie CC DRW LWB 4X4 Cummins Aisin 3.73
Reese Goosebox 20K
2018 Heartland Landmark 365 Oshkosh
2008 Bigfoot 25C9.4 LB Cabover
gearhead is offline   Reply With Quote
Old 04-28-2016, 05:38 PM   #22
35mastr
Member
 
35mastr's Avatar
 
Join Date: Apr 2012
Location: Newark,Ca
Posts: 91
I will see how things work out. As.far as the tread wears. I was hoping for many more responses . So I am on on my own now.
__________________
2015 GMC 2500 HD
2012 314FWRLS Copper Canyon
Pullrite Superglide 16K Hitch
[B]Honda 3000IS
35mastr is offline   Reply With Quote
Old 04-29-2016, 06:20 AM   #23
CWtheMan
Senior Member
 
CWtheMan's Avatar
 
Join Date: Feb 2010
Location: Taylors, SC
Posts: 3,031
Here's the deal with the Michelin XPS Ribs. None of them have the load capacity of your Original Equipment tires. Look in the reference below.

http://www.michelinman.com/US/en/hel...res.html#tab-4

Wheel spacing can be a problem when going to any 85 tire. They are normally taller than the 80 tires. Even the ST235/85R16E (3640#) and ST235/85R16F (3969#) are taller.

You will hear a lot of different talk about rim size and capacity. If you narrow that information down to tire industry standards the recommendations will always be to have rims equal to the maximum weight and PSI requirements of the tires fitted to them.
CWtheMan is offline   Reply With Quote
Old 04-29-2016, 06:29 AM   #24
CWtheMan
Senior Member
 
CWtheMan's Avatar
 
Join Date: Feb 2010
Location: Taylors, SC
Posts: 3,031
Quote:
Originally Posted by gearhead View Post
So why are you wanting to run 100psi in a wheel that is only rated for 94? It isn't much over, but it's over. Why not run the tires at 94 or 90psi?
The industry standard for replacement tires is to meet the load requirements of the original tires. So if the originals provided 3520# of load capacity at a recommended tire inflation pressure of 80 PSI you are supposed to go to the load inflation chart for the replacement tires and inflate them to what ever PSI will provide that 3520#.

In actuality, when aired to that sort of value you gain nothing but durability from the replacements because strength is only proportional to the amount of inflation pressure used.
CWtheMan is offline   Reply With Quote
Old 04-29-2016, 06:33 AM   #25
CWtheMan
Senior Member
 
CWtheMan's Avatar
 
Join Date: Feb 2010
Location: Taylors, SC
Posts: 3,031
Quote:
Originally Posted by darrylwt View Post
Is the 235/85/16 a LT tire?
The LT235/85R16 can be found in LRE & LRG. The ST235/85R16 are now being built in LRE, LRF and LRG.
CWtheMan is offline   Reply With Quote
Old 04-29-2016, 06:43 AM   #26
CWtheMan
Senior Member
 
CWtheMan's Avatar
 
Join Date: Feb 2010
Location: Taylors, SC
Posts: 3,031
All of the steel cased 16" tires used for trailer service have a minimum rim width of 6.5". Some of their tire manufacturers are so serious about it they are putting that information on the tire's sidewall. Below is a picture of a tire so marked.

http://www.irv2.com/photopost/showfull.php?photo=29709
CWtheMan is offline   Reply With Quote
Old 04-29-2016, 07:46 AM   #27
35mastr
Member
 
35mastr's Avatar
 
Join Date: Apr 2012
Location: Newark,Ca
Posts: 91
Does anyone have a link to the pressure calculator?
__________________
2015 GMC 2500 HD
2012 314FWRLS Copper Canyon
Pullrite Superglide 16K Hitch
[B]Honda 3000IS
35mastr is offline   Reply With Quote
Old 04-29-2016, 09:29 AM   #28
CWtheMan
Senior Member
 
CWtheMan's Avatar
 
Join Date: Feb 2010
Location: Taylors, SC
Posts: 3,031
Quote:
Originally Posted by 35mastr View Post
Does anyone have a link to the pressure calculator?
If you're referring to a tire inflation chart this one is from Goodyear. Load inflation charts are standard from brand to brand from the same size and design. This one has both LT and ST charts.

http://www.goodyearrvtires.com/pdfs/rv_inflation.pdf

Here is another one from Maxxis.

http://www.maxxis.com/trailer/traile...nflation-chart

For all other sizes this has everything Toyo makes. Remember, they cross over to other brands of the same size and design and are all approved by the TRA.

https://toyotires2-1524598101.netdna...s_20151020.pdf
CWtheMan is offline   Reply With Quote
Old 04-29-2016, 09:57 AM   #29
gearhead
Senior Member
 
Join Date: Jul 2013
Location: Liberty, Texas
Posts: 5,021
Quote:
Originally Posted by CWtheMan View Post
The industry standard for replacement tires is to meet the load requirements of the original tires. So if the originals provided 3520# of load capacity at a recommended tire inflation pressure of 80 PSI you are supposed to go to the load inflation chart for the replacement tires and inflate them to what ever PSI will provide that 3520#.

In actuality, when aired to that sort of value you gain nothing but durability from the replacements because strength is only proportional to the amount of inflation pressure used.
CW, either I can't write, I misunderstood the poster, or you misunderstood me.
He said his wheels were rated for 94 psi, but he was going to inflate them to 100 psi. I was just raising the issue that he was over inflating his wheels.
__________________
2018 Ram 3500 Laramie CC DRW LWB 4X4 Cummins Aisin 3.73
Reese Goosebox 20K
2018 Heartland Landmark 365 Oshkosh
2008 Bigfoot 25C9.4 LB Cabover
gearhead is offline   Reply With Quote
Old 04-29-2016, 03:53 PM   #30
CWtheMan
Senior Member
 
CWtheMan's Avatar
 
Join Date: Feb 2010
Location: Taylors, SC
Posts: 3,031
Quote:
Originally Posted by gearhead View Post
CW, either I can't write, I misunderstood the poster, or you misunderstood me.
He said his wheels were rated for 94 psi, but he was going to inflate them to 100 psi. I was just raising the issue that he was over inflating his wheels.
You see, after he did it you followed suit. I was just trying to squeeze out the right nomenclature. Tire for tire and wheel/rim for wheel/rim. The 94 number does not fit anything.

He said above "wheel rated for 94 psi". Later on he in another post he asks what the Goodyear's were rated for. Again I surmise he is asking about tires and their inflation pressures.
CWtheMan is offline   Reply With Quote
Old 04-29-2016, 05:05 PM   #31
gearhead
Senior Member
 
Join Date: Jul 2013
Location: Liberty, Texas
Posts: 5,021
Ok. I took him for his word that the wheel was rated for 94. Then when he said he was going to run them at 100, I just wanted to point out that he was beyond the pressure rating of the wheel.
I went back and read it, and yes the way I wrote it, it could be misinterpreted. I was trying to say if the wheel is rated for 94psi, he could run them at 90, or whatever # I said.

I can't stand referencing wheels as rims. That is 2 different things to me. My opinion a rim is bolted to wheel, like on a 1938 Mack truck. For some reason using the term rim width doesn't bother me! Yeah, I'm crazy.
__________________
2018 Ram 3500 Laramie CC DRW LWB 4X4 Cummins Aisin 3.73
Reese Goosebox 20K
2018 Heartland Landmark 365 Oshkosh
2008 Bigfoot 25C9.4 LB Cabover
gearhead is offline   Reply With Quote
Old 04-29-2016, 09:27 PM   #32
CWtheMan
Senior Member
 
CWtheMan's Avatar
 
Join Date: Feb 2010
Location: Taylors, SC
Posts: 3,031
Quote:
Originally Posted by gearhead View Post

I can't stand referencing wheels as rims. That is 2 different things to me. My opinion a rim is bolted to wheel, like on a 1938 Mack truck. For some reason using the term rim width doesn't bother me! Yeah, I'm crazy.
I hear you. A lot depends on where your (if any) training came from. Mine came from Naval Aviation. In that context we were told that when a wheel in two parts it was in fact a wheel (Naval Aviation Maintenance Manual nomenclature) and when it was a single unit it was a rim. There was probably a test question in there somewhere.
CWtheMan is offline   Reply With Quote
Old 04-30-2016, 04:13 AM   #33
gearhead
Senior Member
 
Join Date: Jul 2013
Location: Liberty, Texas
Posts: 5,021
Quote:
Originally Posted by CWtheMan View Post
I hear you. A lot depends on where your (if any) training came from. Mine came from Naval Aviation. In that context we were told that when a wheel came apart it was in fact a wheel (Naval Aviation Maintenance Manual nomenclature) and when it was a single unit it was a rim. There was probably a test question in there somewhere.
Airedale eh. I was a ET(R) reservist. Barely remember Ohms Law.
But I will remember some laws and formulas for life. None of which can be repeated here.
__________________
2018 Ram 3500 Laramie CC DRW LWB 4X4 Cummins Aisin 3.73
Reese Goosebox 20K
2018 Heartland Landmark 365 Oshkosh
2008 Bigfoot 25C9.4 LB Cabover
gearhead is offline   Reply With Quote
Old 05-07-2016, 08:21 AM   #34
Desert185
Senior Member
 
Desert185's Avatar
 
Join Date: Jul 2014
Location: Nevada
Posts: 2,695
Quote:
Originally Posted by gearhead View Post
Airedale eh. I was a ET(R) reservist. Barely remember Ohms Law.
But I will remember some laws and formulas for life. None of which can be repeated here.
Ahh...education not taught in schools. Invaluable in the real world.
__________________
Desert185 🇺🇸 (Retired Chemtrail vendor)
-Ram 2500 QC, LB, 4x4, Cummins HO/exhaust brake, 6-speed stick.
-Andersen Ultimate 24K 5er Hitch.
-2014 Cougar 326SRX, Maxxis tires w/TPMS, wet bolts, two 6v batts.
-Four Wheel 8' Popup Camper.
Desert185 is offline   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
Forum Jump

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by the Keystone RV Company or any of its affiliates in any way. Keystone RV® is a registered trademark of the Keystone RV Company.


All times are GMT -8. The time now is 10:05 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.