|
01-13-2013, 02:15 PM
|
#1
|
Senior Member
Join Date: Dec 2012
Posts: 508
|
Tire Pressure rule of thumb
This has probably been beat to death, but, what do you use as your rule for tire pressures. The tires say max cold 95 PSI. I know what this means. Do you run them at max cold, or a little under. 225x19.5 radial tires. Dual rear. I don't have a book for the coach and the workhorse manual says to refer to the chart. I can't find one.
Thanks
Tom
__________________
2014 KZ Durango Goldrush
2018 Chevy 2500 HD Duramax/Allison
|
|
|
|
Join the #1 RV Forum Today - It's Totally Free!
iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!
You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!
|
01-13-2013, 02:22 PM
|
#2
|
Senior Member
Newmar Owners Club
Join Date: Oct 2009
Posts: 10,310
|
Hello, do a search on here about "tire pressure" and you will be able to read to your heart's content. You have to know the weight on the tires and then go by the mfg. tire pressure charts. What kind of tires do you have?
__________________
2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer, 2003 Harley-Davidson
FLHR Road King Anniversary
|
|
|
01-13-2013, 02:25 PM
|
#3
|
Senior Member
Monaco Owners Club Winnebago Owners Club
Join Date: Sep 2011
Posts: 7,469
|
Tire pressure should be based on loaded weight of the coach. Once the weight is known you can then compare that weight to the tire manufacturer's chart. Charts are usually available on line from the manufacturer.
Corner weights are best but axel weights will do.
Only rule of thumb I am aware of is that its better to run higher (without exceeding max pressure) rather than lower as you will damage the sidewall if under inflated for the loaded weight
__________________
US Navy Vet, Liberty Tree Member of Oath Keepers, NRA & VFW Life Member, Alaska EMT.
2009 Safari Cheetah 40 SKQ
2009 Winnebago Chalet 231CR
|
|
|
01-13-2013, 02:49 PM
|
#4
|
Senior Member
Join Date: Jul 2010
Posts: 5,332
|
Quote:
Originally Posted by tompen
This has probably been beat to death, but, what do you use as your rule for tire pressures. The tires say max cold 95 PSI. I know what this means. Do you run them at max cold, or a little under. 225x19.5 radial tires. Dual rear. I don't have a book for the coach and the workhorse manual says to refer to the chart. I can't find one.
Thanks
Tom
|
Somewhere in the coach you should find a piece of paper perhaps glued inside a closet. (Mine is just under the driver side window) It should show the GVWR, GAWR and the tire pressures based on these numbers. These numbers are the ones to be used. Having said that, the best plan is to get your unit weighed, then use those numbers along with a chart from your tire manufacturer and come up with the proper pressure.
__________________
Tom
2016 Newmar Bay Star Sport 3004
2021 Jeep Gladiator Sport Willys
|
|
|
01-13-2013, 03:53 PM
|
#5
|
Senior Member
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Feb 2000
Location: San Jose, Ca, USA
Posts: 2,697
|
Quote:
Originally Posted by tompen
The tires say max cold 95 PSI. I know what this means.
|
Not quite enough information here, but I can say with good confidence that your tires do NOT say "max cold 95psi". If they happen to be Goodyears, for instance, in 225/70R19.5 Load Range F then they say "Max Load (Dual) 3415 lbs at 95 psi Max" (or close to that). What that means is that if the tire is inflated to 95 psi then it can safely support 3415 lbs in a dual wheel configuration. If you exceed that weight, or inflation, then the tire is not guaranteed to hold up. If you lower the pressure to 90 psi then it can only safely carry 3245 lbs in a dual configuration; at 85 psi it can safely carry 3115 lbs in a dual configuration.
What does this all mean? Basically, in order to know how much air your tires need you need to know how much weight they are carrying.
__________________
Alan Hepburn - San Jose, Ca
2007 Bounder 35E being pushed by a 2020 Jeep Gladiator Sport S or a 2022 Jeep Wrangler Unlimited (JLU) Sport S
|
|
|
01-13-2013, 04:38 PM
|
#7
|
Senior Member
Join Date: Dec 2012
Posts: 508
|
Thanks folks. I get the weight/pressure thing. Just no way I can get it weighed before heading out. There is a chart in a cupboard giving the gross weight etc, but nothing about tire pressures. I have to get some flexible extensions for the inside duals and then I will wing it. I'll see how it rides and handles at 85psi. Thanks again.
Tom
__________________
2014 KZ Durango Goldrush
2018 Chevy 2500 HD Duramax/Allison
|
|
|
01-13-2013, 04:43 PM
|
#8
|
Senior Member
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Jul 2012
Location: Fair Play, SC
Posts: 986
|
In my Bounder there is a chart in my bedroom stating recommended pressure. I am well below the weight limits and I drive at the recommended settings of 95 cold for the fronts and 85 cold for the duelies.
__________________
Richie, Rose and our Australian Terrier Harley
2004 Bounder 35R, 2012 ACME EZtow,2012 Kia Rio Hatchback
|
|
|
01-13-2013, 07:24 PM
|
#9
|
Senior Member
Join Date: Dec 2012
Posts: 508
|
Thanks Gadget
I'll keep looking for that chart. Near as I can tell I will be about 16,000 lbs. Maybe 95 in front is a good starting point. Lot easier to drop them down on the road than add air.
Tom
__________________
2014 KZ Durango Goldrush
2018 Chevy 2500 HD Duramax/Allison
|
|
|
01-13-2013, 08:32 PM
|
#10
|
Senior Member
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Jul 2012
Location: Fair Play, SC
Posts: 986
|
Tom I bought a tire pressure monitoring system and I feel safer knowing tire pressure and temperature at a glance. And, in my opinion I'd rather run higher then lower, lower gets you in trouble with overheating and blowouts.
p.s.
I have an 08 softtail classic... love that bike!
__________________
Richie, Rose and our Australian Terrier Harley
2004 Bounder 35R, 2012 ACME EZtow,2012 Kia Rio Hatchback
|
|
|
01-14-2013, 07:14 AM
|
#11
|
Senior Member
Join Date: Dec 2012
Posts: 508
|
I worked in the office at an independant big truck shop for a few years after I retired. He was an old friend and needed a little help straightening out his office. I'm going to run over there this morning and talk about a monitering system. I didn't remember how much those tires cost.
My entertainment for a few years was a new Harley every 2 years and my Toy Hauler. I bought the Spyder to ride 2 up and love it. The touring bikes are too high for me to be comfortable on now. The Softail is perfect.
__________________
2014 KZ Durango Goldrush
2018 Chevy 2500 HD Duramax/Allison
|
|
|
01-14-2013, 07:29 AM
|
#12
|
Moderator Emeritus
Join Date: Jan 2007
Location: Litchfield Park, Arizona
Posts: 10,530
|
Without knowing the weight of the rig, I would go with what's stamped on the sidewall. It'll probably ride rough until you can get it weighed and back off the PSI a bit.
Rick
__________________
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD
|
|
|
01-14-2013, 07:51 AM
|
#13
|
Senior Member
Join Date: Dec 2012
Posts: 508
|
Thanks Rick
Thats kind of the info I was looking for. I always tend to keep under the PSI on the tire. I learned that trailer tires should be run at that pressure. Made a big difference on my Toy Hauler. I moved the pressure from 70 to 85 PSI and it towed much better. Not too old to learn from experienced folks.
Tom
__________________
2014 KZ Durango Goldrush
2018 Chevy 2500 HD Duramax/Allison
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|