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Old 10-08-2011, 09:02 AM   #1
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Tire pressures

What would be the correct tire pressures for a Allegro Ba 32 fully loaded with a toad. I have a 2011 and I do not have a scale in my area. I am running Mitchlins
235/80r 22.5 all around. I have been running 82-83 front 84-85 rear in and out.
On an Ford F53 chassis
Thanks
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Old 10-08-2011, 09:58 AM   #2
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You can only tell for sure eif you weigh your rig full.

235/80R22.5 LRG XRV, XZE
PSI707580859095100105110Maximum load & pressure on sidewallkPa480520550590620660690720760LBSSingle347 036453860397541404300445546104675S4675 LBS at 110 PSIDual632066307050723075307940811083908820D4410 LBS at 110 PSIKGSingle157016501750180018801950202020902120S21 20 KG at 760 kPaDual286030003200328034203600368038004000D2000 KG at 760 kPa
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Old 10-08-2011, 10:01 AM   #3
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Michelin North America RV Load & Inflation Tables

Try this again: Here is a link to the Michelin weight tables----you need to weigh your rig completely full, as you would travel, if possible weigh each corner, then use the chart.
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Old 10-08-2011, 10:17 AM   #4
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I missed the part where you did not have a scale but: my guess you would be low on psi and my reasoning is you do not have he facts about weight so you are better off with more psi just in case until you can weigh.

You are about 44 miles from Atlantic city---if there is a Flying J around they may have a CAT scale----Interstates have weigh scales and sometimes they are left on even though the scale is closed.

You have to find a way to get the weight of your coach loaded otherwise it is just a guess and can be wrong (many people are surprised when they weigh their coaches).

In a pinch you can use the manufacturers axel weight posted in your rig then estimate but this is really a very poor second chice to weighing.

Worth a trip to weigh.

Any way I gave you the link to the weight tables from Michelin---do your best. And if you are unsure better go to the higher psi rather than risk underinflation. You did not specify what Michelin but a good guess is the XRV and they can handle considerably more psi (see the tables) until you can weigh.
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Old 10-08-2011, 11:57 AM   #5
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If no weigh then no way except you can run the tires at the stated maximum pressure for the size/manufacturer of your tires. Don't exceed the pressure rating of the wheels however.

If you travel any distance on any interstate highway you will pass a truck stop. 99% of them have scales.
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Old 10-08-2011, 12:30 PM   #6
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As others have said, no way to know till you weigh the rig, until then use the manufacturers pressure from the sticker that should be beside the driver. If you don't have one then run the minimum pressure for the the maximum tire load shown on the tire sidewall IF IT DOESN'T EXCEED THE MAX. WHEEL PRESSURE.
BTW: the pressure molded on the truck size tire sidewall is NOT the maximum you should ever put in, it's the MINIMUM to support the Maximum weight the tire will support in most cases.
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Old 10-08-2011, 12:47 PM   #7
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What does your data plate say? Thats where I would start..
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Old 10-08-2011, 10:49 PM   #8
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Try stopping at a DOT weigh station. Try to pick one that's not real busy. I've used them and they're free.
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Old 10-09-2011, 06:20 PM   #9
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As previously stated the ONLY way to know the PROPER tire inflation is to weigh the coach. Coach stickers, "data plates", tire manufacturer tables, etc are all GUIDES and ONLY the ACTUAL weight and the tire manufacturers charts (availavble online) will give you the correct inflation.

Check the yellow pages, or Google for public scales in your area. Many times moving companies or the state highway department will let you use their scales. Some large truck facilities; ie. Cat, Freightliner, Kenworth, Cummins have scales as do almost all truck stops; Flying J, travel America, Loves, etc.

With the coach in the fully loaded in the "ready to go configuration", ie full fuel tanks, full water (if you travel that way), food, clothes, people, etc drive onto the scale stopping with only the front axle on the scale. Record that weight. Now drive fully onto the scale so that all 4 or 6 tires are on the scale. Record that weight.

You now know the weight on the front axle and can calculate the weight on the rear. Tow vehicles do not add weight to the rear axle so do not need to be weighed. However, if you travel with motorcycles, scooters or wheelchairs or other items mounted on the back they should be on the coach when weighed as well.

Don't forget to add the weight of the barbells, those tool boxes, that machine shop or rock collection you sometimes carry if that is something you do.

Some people like to weight one side of the coach on the scales, ie one front and rear wheel(s) on the scale. This way they will know if there is any significant weight difference between the driver and passenger side. Personally I don't worry about that as I am going to inflate the tires on any given axle to the SAME PSI. IF you carry HEAVY personal or hobby items weighing one side would help you more evenly distribute the weight within the caoch.

Some owners say "just inflate to the maximum rating on the tire" but that makes for a harder than needed ride if you could be running 15-20 PSI less and it doesn't really take into consideration the ACTUAL coach's weight. Underinflation will result in premature wear, potential tire failure and higher fuel useage.
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Old 10-10-2011, 12:38 AM   #10
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I like to use Beacons Moving and storage. They charge $7.00 per reading. I weigh the front then the rear and inflate based on true loaded weight. With out knowing your actual weight there is no way to know what proper inflation should be. I run 90 to 95 psi rear and 105 to 115 psi front based on actual loaded weight. THese pressures are from Goodyear's chart for 275 70R 22.5
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Old 10-10-2011, 05:54 AM   #11
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North Wildwood, New Jersey Truck Scales and Weigh Stations for Truck Drivers and Trucking Companies at Truckstops

according to this website you are 60 miles from a number of scales at truck stops. In a couple of hours you can have all the information needed to be accurate.


I would increase your pressure to about 90 - 95 psi and the next time you are fully loaded run up there and weigh before you continue on your trip. Then the next day when your tires are cool adjust them to the correct pressure for your weight.
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Old 10-10-2011, 09:42 AM   #12
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Quote:
Originally Posted by JKill View Post
What would be the correct tire pressures for a Allegro Ba 32 fully loaded with a toad. I have a 2011 and I do not have a scale in my area.
There are 3 scales within 60 miles of you.
40 miles
View Map Shore Stop #288 HWY 13 & HWY 286 Felton, DE 19943 59 miles
View Map 301 Plaza US 301 Middletown, DE 19709 60 miles
View Map All American Gas I-295 Exit 2C CARNEY'S POINT, NJ 08069
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Old 10-10-2011, 01:06 PM   #13
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Quote:
Originally Posted by Triker56 View Post
There are 3 scales within 60 miles of you.
40 miles
View Map Shore Stop #288 HWY 13 & HWY 286 Felton, DE 19943 59 miles
View Map 301 Plaza US 301 Middletown, DE 19709 60 miles
View Map All American Gas I-295 Exit 2C CARNEY'S POINT, NJ 08069
It may not matter. The op has not posted on this thread again.
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Old 10-10-2011, 01:39 PM   #14
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Quote:
Originally Posted by sdennislee View Post
I like to use Beacons Moving and storage. They charge $7.00 per reading. I weigh the front then the rear and inflate based on true loaded weight. With out knowing your actual weight there is no way to know what proper inflation should be. I run 90 to 95 psi rear and 105 to 115 psi front based on actual loaded weight. THese pressures are from Goodyear's chart for 275 70R 22.5
However: if you're 1,000# heavier on one side (which you have no way of knowing with your method) than the other then your method leaves you with underinflated tires on that side. In fact you'd be better off using the sticker on the rig since it's values are for the rig loaded to it's max.
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