keigm Report post Posted October 8, 2019 Apologize in advance for this question. We recently purchased a 2019 Newmar London Aire. It has a Gross Weight of approximately 55,000 lbs. We will be going to the FMCA Convention in Tucson next March and will get the coach weighed accurately but until then I need some advice on what tire pressures I should be using until then. We are part time and have the coach moderately loaded up. I would guess our current gross weight is approximately 51K. I know I will need a little margin of safety for our guestamates. Thank you in advance for you advice. Share this post Link to post Share on other sites
wolfe10 Report post Posted October 8, 2019 Keigm, Many truck stops have scales to allow axle weights to be determined. A good "intermediate" step. SO, until you get any weighing done, go by the GVWR sticker in the coach (assumes each axle loaded to GAWR). Next best is to get axle weights. Add a fudge factor for left/right imbalance and go to your tire manufacturer's inflation table to determine correct minimum PSI. Then after individual wheel position weighing in Tucson, use the heavier wheel position on each axle to go to your tire manufacturer's inflation table. Share this post Link to post Share on other sites
hermanmullins Report post Posted October 8, 2019 Until you have your coach weighed I would use the setting listed on you documentation sheet on the wall next to the driver seat. Good Luck, we will also be in Tucson in March. Mapping out the trip as we speak. Same answer as Brett, his typing is faster then mine. Herman Share this post Link to post Share on other sites
keigm Report post Posted October 8, 2019 Thanks, see you in Tucson. Share this post Link to post Share on other sites
hermanmullins Report post Posted October 8, 2019 Give me a shout. I will be on a Golf Cart with SAFETY on the windshield, there are three of us and I am the Good Looking one with Gray hair. Herman Share this post Link to post Share on other sites
tireman9 Report post Posted December 13, 2019 I will be giving a couple of seminars (different topic details) on tires in RV application at Tuscon. Check the seminar schedule and check out the Convention app. Happy to answer specific tire-related questions anytime. Till then follow Brett & Herman's advice. If you are not going to run the Tire Placard suggested inflation, my rule of thumb for an estimate side to side imbalance is to assume 53% of the truck scale axle weight is on one side. Then consult load tables. You can learn more by checking out my tire blog. Share this post Link to post Share on other sites
manholt Report post Posted December 14, 2019 We will see you at the tire seminar! Herman, we'll be there the 24th, 50 amp Handicap! Share this post Link to post Share on other sites
