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Old 01-08-2015, 05:55 PM   #1
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Tire inflation after weighing motorhome

I have a class c motorhome coachman concord 225LE. I had the motorhome weighed front axle 4,080 lbs and the drive axle 7,540 lbs. I have uniroyal Lt 225/75/R16E tires. The GVWR 14200 lbs. this is what tire and load on driver door front axle 4600 lbs air pressure 65 lbs and rear axle duals 9600 lbs air pressure 80 lbs. i would like to know what air pressure to put in tires after weighting motorhome, as I would like to add crossfire to rear dual tires. Thanks in advance
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Old 01-08-2015, 08:58 PM   #2
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Wow, many other tire makers have easy to find and use load/psi charts on their websites. Uniroyal seems to hide it in brochures for each tire group.

Here's a link to the PDF that includes your tire with axle weights and PSI.

http://www.uniroyaltires.com/assets/pdf/laredo_hdh.pdf
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Old 01-09-2015, 02:01 PM   #3
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Make sure your tires are cold when you take a pressure reading. Taking the pressure and filling them to spec when cold is the way to go.
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Old 01-09-2015, 03:15 PM   #4
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Originally Posted by Larryhobby View Post
I have a class c motorhome coachman concord 225LE. I had the motorhome weighed front axle 4,080 lbs and the drive axle 7,540 lbs. I have uniroyal Lt 225/75/R16E tires. The GVWR 14200 lbs. this is what tire and load on driver door front axle 4600 lbs air pressure 65 lbs and rear axle duals 9600 lbs air pressure 80 lbs. i would like to know what air pressure to put in tires after weighting motorhome, as I would like to add crossfire to rear dual tires. Thanks in advance
Larryhobby
I've had Link "Cat's Eye equalizers" on my duallys for 12 years, (nearly 100k miles): Cat's EyeŽ - Link
They are similar to the Crossfires (and one of most useful accessories I've addded).
Mel
'96 Safari
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Old 01-09-2015, 03:27 PM   #5
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Larryhobby
I've had Link "Cat's Eye equalizers" on my duallys for 12 years, (nearly 100k miles): Cat's EyeŽ - Link
They are similar to the Crossfires (and one of most useful accessories I've addded).
Mel
'96 Safari
I put the Cat's Eye Equalizers (stainless steel hoses) on mine four years ago. Just a glance at the Cats Eye tells me that the tire pressure in both dually's are equal and OK. Love em.
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Old 01-09-2015, 03:32 PM   #6
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One side comment,, Some will disagree with me on this but you need side to side as well as axle weights.

Averaging is good (Divide axle by number of tires on it) but.... Many motor homes (And trailers) are heavier on one side or the other.
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Old 01-09-2015, 05:19 PM   #7
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One side comment,, Some will disagree with me on this but you need side to side as well as axle weights.
Averaging is good (Divide axle by number of tires on it) but.... Many motor homes (And trailers) are heavier on one side or the other.
Correct.
AND the proper "cold inflation pressure" to use in ALL of the tires on any one axle is determined by the tire chart pressure chart.....based on the heaviest weight the tire, (or tires), on that axle carry.
Mel
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Old 01-10-2015, 07:07 AM   #8
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Tires

My class C 22ft weighs 9970, I had 60 pds of air and up'ed it to 70, it improved the 'sway' considerably, then tried 80 pds, then the ride was too hard, too many rattles etc. so i backed it back off to 70, seems on my coach that is the best.
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Old 01-10-2015, 09:19 AM   #9
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My class C 22ft weighs 9970, I had 60 pds of air and up'ed it to 70, it improved the 'sway' considerably, then tried 80 pds, then the ride was too hard, too many rattles etc. so i backed it back off to 70, seems on my coach that is the best.
Bukiman
The "BEST" and "SAFEST" tire pressure to use is the pressure printed on the tire inflation chart... (based on the weight each tire on your coach is actually carrying).
BTW, the "recommended pressures" on that chart may not make your coach "handle" and/or "ride" the "best".
Mel
'96 Safari
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Old 01-10-2015, 09:23 AM   #10
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Originally Posted by Bukiman View Post
My class C 22ft weighs 9970, I had 60 pds of air and up'ed it to 70, it improved the 'sway' considerably, then tried 80 pds, then the ride was too hard, too many rattles etc. so i backed it back off to 70, seems on my coach that is the best.
Bukiman
The best, and safest tire pressures to use in your tires are the pressures printed on the tire manufacture's tire inflation chart... (based on the weight each tire on your coach is actually carrying).
BTW, the "recommended pressures" on that chart may not make your coach "handle" and/or "ride" the "best".
Mel
'96 Safari
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