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01-20-2021, 02:00 PM
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#1
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Nov 2020
Posts: 197
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Toyo 295/75-22.5 tire pressure
Hello All, I've tried to do a search for this but the results are all over the board except for the answer i want. I want to check air pressure on my tires and add if necessary. Do I go off of what the tire specifies? and how long does a tire typically last, it seems that rvers use dates rather then wear as the barometer for getting new tires.
thanks...Fred
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2002 Newmar Mountain Aire 4097  ISL400 Cummins on a Spartan chassis
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01-20-2021, 02:04 PM
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#2
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Registered User
Join Date: Dec 2019
Posts: 329
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You need to weigh your rig "each axle" for a proper answer. Michelin website clearly states 10 years Max if no cracks or other signs of deterioration.
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01-20-2021, 02:54 PM
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#3
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Senior Member
Join Date: Mar 2019
Posts: 113
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You can find the weight chart for your particular tires online. Weigh your coach, add 5 to 10 percent, look up the weights in the weight table and set your tire pressures accordingly.
For my 2005 Mountain Aire DP 4032 running Bridgestone tires, I run105 in the fronts and 95 in the fronts
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01-20-2021, 04:09 PM
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#4
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Senior Member
Spartan Chassis RV Trip Wizard
Join Date: Mar 2014
Location: central Florida, Lake Ashton RV community
Posts: 401
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Hi Fred,
You are correct, tire information is all over the map. In a nutshell this link gives you everything you need for Michelin. If you have another brand go to that manufacturer and get their chart. More importantly, this doc gives you the background info.
https://michelinb2b.com/wps/b2bcontent/PDF/RV_Tires_Brochure.pdf
Corner weigh your coach loaded with fuel, water (that you typically carry) & gear. If you haul a load of people, account for that. Use the heaviest corner weight for inflation lookup on the chart for each axle. If one side is much heavier than the other try to rearrange items.
As for tires, they usually age out before they wear out. This varies somewhat depending upon how well the tires are treated and how long they are exposed to the elements (uv rays) etc.
A coach that is stored indoors will have less exposure and should last longer. 5-7 years is a good rule of thumb.
Good luck,
John
__________________
2008 Fleetwood Excursion 40X Sold
2015 GMC Canyon Crew Cab LB Toad
2019 Newmar Dutch Star 4369 (Spartan)
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01-20-2021, 05:26 PM
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#5
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Senior Member
Join Date: Sep 2010
Posts: 3,765
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Many of us Newmar owners would suggest replacing your tires after 6 years based on the date code of the tire. After 275K miles of travel from Alaska and every other state and having 2 blow outs it just doesn't make sense to go 10 years. Michelin says after 5 years to dismount the tires every year to inspect the inside of the tire which is a big job. With a front tire blowout on our Essex returning to lower 48 at over 20K dollars damage and not having the coach for 4 months with 6 year old tires makes us well aware of the importance of our coach tires.
Newmar Man
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Tom/Teri 16031 NKK 117995 FMCA
18 London Aire 4531 Spartan K-3 605
97-04 LA 04-18 Essex 2018 London Aire
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01-21-2021, 05:41 AM
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#6
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Senior Member
Join Date: Nov 2018
Location: Rendon, Texas
Posts: 514
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Quote:
Hello All, I've tried to do a search for this but the results are all over the board except for the answer i want. I want to check air pressure on my tires and add if necessary. Do I go off of what the tire specifies? and how long does a tire typically last, it seems that rvers use dates rather then wear as the barometer for getting new tires.
thanks...Fred
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We have the Toyo 295/75 R22.5 tires and a similar coach. I have weighed ours when loaded for travel. Currently run 94 on the front and 80 on rear. I called Toyo and they were very helpful and they sent me a chart. The proper pressure improved the ride and handling. Also had the wheels aligned.
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Howard & Elaine
2001 Newmar Dutch Star 4095, CAT 330
2014 SRX toad, M&G breaking, Blue OX Avail
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01-21-2021, 12:37 PM
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#7
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Nov 2020
Posts: 197
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thanks for all your suggestions...I was able to search on Toyo's site for the rv tire and inflation chart and got this...
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2002 Newmar Mountain Aire 4097  ISL400 Cummins on a Spartan chassis
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01-21-2021, 12:39 PM
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#8
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Nov 2020
Posts: 197
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Quote:
Originally Posted by hewebb
We have the Toyo 295/75 R22.5 tires and a similar coach. I have weighed ours when loaded for travel. Currently run 94 on the front and 80 on rear. I called Toyo and they were very helpful and they sent me a chart. The proper pressure improved the ride and handling. Also had the wheels aligned.
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where would you go to get your wheels aligned?
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2002 Newmar Mountain Aire 4097  ISL400 Cummins on a Spartan chassis
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01-22-2021, 06:39 AM
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#9
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Senior Member
Join Date: Nov 2018
Location: Rendon, Texas
Posts: 514
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I had ours done at Cowser tire in Fort Worth. They are a large truck tire dealer.
https://cowsertire.com/
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Howard & Elaine
2001 Newmar Dutch Star 4095, CAT 330
2014 SRX toad, M&G breaking, Blue OX Avail
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01-23-2021, 09:05 AM
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#10
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Senior Member
Newmar Owners Club
Join Date: Dec 2017
Location: Rochester, NY
Posts: 318
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Not sure if you are near Spartan, they would be a great choice. We had ours done at Freightliner in Gaffney. Important to check ride height and tire pressure prior to alignment
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Steve, Joanne and Tyler (rescued Australian Cattle Dog)
2018 Canyon Star 3901, 2020 Ventana 4362, Grand Cherokee, TST TPMS, RVI3
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01-23-2021, 02:32 PM
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#11
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Senior Member
Newmar Owners Club
Join Date: Sep 2005
Location: Tulsa, OK
Posts: 632
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Quote:
Originally Posted by chefred112
Hello All, I've tried to do a search for this but the results are all over the board except for the answer i want. I want to check air pressure on my tires and add if necessary. Do I go off of what the tire specifies? and how long does a tire typically last, it seems that rvers use dates rather then wear as the barometer for getting new tires.
thanks...Fred
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I can tell you from experience don't ignore the date code. I am a firm believer in the 6 year rule.
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Jim Mefford
2018 New Aire 3343
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