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Topic: Coach weight & tire pressure: what air pressure are you running? (Read 231 times) previous topic - next topic
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Coach weight & tire pressure: what air pressure are you running?
I had the MB weighed today, the front axle is 4060#, the rear is 8500#.  This is with full water tank, empty waste tanks, me in drivers seat, with a typical load out. 
I'm running Cooper Discoverer HTP LT225/75/16 tires which have a max load of 2680# at 80psi max.  I'm currently running 65psi in front and 75psi in the rears.  I can't find a weight chart for these so wondering what air pressure should I be running.
Any suggestions?
Thanks!
2004 26.5 MB
Enjoying retirement traveling, Rzr riding, photography, and of course the 2 grand girls!
Re: Coach weight & tire pressure: what air pressure are you running?
Reply #1 –
Front axle is 4085# and the rear axle is 8660#.  Running Michelin LT 225/75 R16 with 60 psi in the front and 70 psi in the rear.  Btw, recommended tire pressure may depend on the tire manufacturer.  Michelin load and inflation table at Load & Inflation Tables | Michelin Truck

Hope this helps.
Re: Coach weight & tire pressure: what air pressure are you running?
Reply #2 –
2000 MB

Condition:  Fuel Fuel, full water, full propane, empty grey and black, driver plus 1 and gear for months on the road.
Tires: Firestone
Actual weighs:  Front: 4440 lbs   Rear: 8860    Weight fairly distributed left to right
Tire pressure at 59 degrees  and sea level:  Front: 61 PSI   Rear: 69 PSI





 




2000 MB
Re: Coach weight & tire pressure: what air pressure are you running?
Reply #3 –
Consulting the load charts, Fronts 65+ psi, Rear 70+.
Your LD Owners Manual should have the pressure/load chart.
When adding air, I set the tires 5-psi, over what the chart indicates, to allow for the gradual lose of air.
That way, air is only added a handful of times a year, using the TPMS to keep track of the actual pressure each day.

Larry

Larry
2003 23.5' Front Lounge, since new.  Previously 1983 22' Front Lounge.
Tow vehicles  2020 Jeep Wrangler Rubicon, 2001 Jeep Cherokee
Photo Collection: Lazy Daze
 
Re: Coach weight & tire pressure: what air pressure are you running?
Reply #4 –
Thanks for the info.  Looks like I may be able to lower the pressure a bit and maybe get a slightly softer ride.
BTW the propane tank is full also.
2004 26.5 MB
Enjoying retirement traveling, Rzr riding, photography, and of course the 2 grand girls!