Lazy Daze Owners' Group

Lazy Daze Forums => Lazy Daze Technical => Topic started by: folivier on September 07, 2017, 09:57:37 pm

Title: Coach weight & tire pressure: what air pressure are you running?
Post by: folivier on September 07, 2017, 09:57:37 pm
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!
Title: Re: Coach weight & tire pressure: what air pressure are you running?
Post by: Ed & Margee on September 07, 2017, 10:05:07 pm
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 (http://www.michelintruck.com/reference-materials/manuals-bulletins-and-warranties/load-and-inflation-tables/#/)

Hope this helps.
Title: Re: Coach weight & tire pressure: what air pressure are you running?
Post by: pwgfalcon on September 07, 2017, 10:59:14 pm
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





 




Title: Re: Coach weight & tire pressure: what air pressure are you running?
Post by: Larry W on September 08, 2017, 01:20:55 am
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

Title: Re: Coach weight & tire pressure: what air pressure are you running?
Post by: folivier on September 08, 2017, 09:09:06 am
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.