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BBelanger · 12-01-2016, 10:03 PM

Quote:

Originally Posted by Ramjet

LJowdy, 2015 DS 4369 - I've had the coach weight three times so far. All of them corner weights, and at about 6 months intervals. Once at the factory and twice at Freight Liner in Gaffney. Each turned out to be, what I think, was an accurate weight for the load condition. I than go into the table and add a safety factor of 10 psi in front and 5 psi in the rear. That gives me 110 in the front and 90 for the drive and tag. Hope that helps.

Ramjet, what is a "safety factor"?

ewlee · 12-01-2016, 10:50 PM

Quote:

Originally Posted by BBelanger

Ramjet, what is a "safety factor"?

I did the same thing as Ramjet. Tire loading and tire inflation is probably one of the most misunderstood aspect of owning a RV and one that is most debated. The worst thing you can do is run your tires with a lower than required psi based on your weight. Running them with lower than required psi will damage the sidewalls and create higher temps while running down the road. A "safety factor" of 5-10 psi added to what is required by the inflation charts will cover things like a lower than expected outside temp, additional weight on board, higher altitude, unexpected water in tanks, or anything else that would effect the tires/tire pressure. This will keep you from constantly adjusting tire psi. A low inflation can lead to a blow out while a higher inflation will cause a slightly harsher ride. Give me the harsher ride anytime.

andyh · 12-02-2016, 05:36 AM

The 2016 DSDPs are much heavier than the previous year coaches due to upgraded chassis and slide mechanism. The early ones. The later ones have been equipped with 19000# front axels and the early ones Newmar will pay for the axel change from 17000# to 19000#. Unless you weigh your coach, stay with the 130# pressure. It is unlikely that you will be able to reduce it by much. It is irresponsible to recommend lowered tire pressures than the sticker based on earlier coaches without knowing all the options, loading and equipment changes. The 2016 DSDPs were topically weighing over 17000# on the front axel.

2015 DSDP 4369, 2014 Grand Cherokee, SMI AF1, VMSpc. Sent from my iPhone using iRV2 - RV Forum