What tire pressure do you run? 8R x 19.5

[HandyDan]

My 1984 Holiday Rambler Imperial is rated at 14,500lbs.  The tire shop put 50lbs of air in the tires and said that should be adequate.  The tires (which are DuraMax 8R x 19.5) are rated at 110lbs for 3500lbs.  Should I be running with more air that 50 lbs?

[tiinytina]

Check your rims!!!   Our Tiffin runs 19.5's (Goodyear) and the tires are rated 110 BUT... the rims say 90 Max... so I run 90 Max cold pressure. ... 

Tina

[DaveVA78Chieftain]

Tire pressure is a function of GVW.  Like Tina said, rim pressure (she also has a P30 chassis like yours) is a consideration as well as tire pressure.
Here is a link to a Goodyear Tire pressure chart:
http://www.goodyear.com/rv/pdf/rv_inflation.pdf

[HandyDan]

According to the chart, I should have at least 65lbs as a minimum.  Guess I'll be adding some air.  I would like to get it weighed sometime in the near future.  That would help determine the pressure.  I just thought 50lbs was a little light.

[tiinytina]

Gone is 28' (aluminum frame)on a P30 chassis, almost full fuel, empty water/waste tanks, 4 dogs and left over supplies from weekend she weighed in at 13,800 and is rated to 15,100... on the truck scales a year ago....

Tina

[bluebird]

I run 80 psi in mine. I've found it don't make mine ride any ruffer, but I do get better fuel economy. It rolls much farther when i take my foot off the throttle too. If you don't run enough air the tire will heat up. I used to run as low air pressure as I could trying to help the ride. That was when I had my first MH, many years ago.

[Mississippi Winne]

My understanding is that a general rule of thumb to use is 65 for the rear and 70 for the front. 

Brian

[ClydesdaleKevin]

On our 89 Holiday Rambler Imperial 35 with a P30 chassis and aluminum frame, we run the tires at 100 psi, front and rear, but we carry a lot of weight.  The tires are Michelins.  We also have the trailing Mor-Ryde axle suspension, and those tires also get 100 psi.  Higher tire pressure=lower rolling resistance.  Lower rolling resistance=better gas mileage.  We also cover the tires when parked because to replace the Michelins is bloody expensive!

Kev