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Old 09-03-2015, 05:34 PM   #21
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Old 09-03-2015, 07:50 PM   #22
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I-RV, that's great advice, thankfully Phil gave me the same advice a few weeks ago when I posed the initial question of tire pressure. He also told me to speak to Randy who straightened me out. I was bound for Gaffney anyhow so now I'm riding around on the 12k axles after the bag swap and the 275/80s I referenced earlier...SO....I've got the beefed up 390 also. And my question today it was really get around how to air up the new setup, and it came from the disbelief in my tire guys eyes today when I told him I wanted 85 pounds. I have the us charts, it was the euro chart in wanted to look at that the other poster referenced. What I want to know more than anything is what level of belief the mainstream has that the US specs are purposefully low

I think for those who have had these mods done we should unofficially change their designation to a 390-50!
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Old 09-04-2015, 09:44 AM   #23
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They did the same for me, except I upgraded wheels seeing the new tires as a winfall on a 4 year old used coach. Terrific service, Randy is the man

Kohersh if you don't mind me asking , how much was the upgrade to purchase the alum. wheels ? Thanks.
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Old 09-04-2015, 09:47 AM   #24
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Well sent off an e-mail to Randy and received a reply within 20 mins. He is requesting a weigh in for the coach but stated that they could do the mods in S.C. Yippy-KI-Yay !
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Old 09-04-2015, 09:54 AM   #25
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Great to hear that Joe. That is how mine was done at the Gaffney Freightliner Oasis. They have nice over-night camp sites with electric and potable water nearby. Freightliner does the work, but is covered by FR.
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Old 09-04-2015, 10:24 AM   #26
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Joe, I am working on a write up for my aluminum wheel swap over, to explain it all ion detail because there is not enough on here about it. Freightliner is going to tell you its 3k....that is plain and simple what it is for them to do the work and a large part of it is the labor and the accessories needed to finish off the installation. Expect to wait weeks to months for the wheels to arrive. I went a different route, it was less money and looks nice. It was $1,985 for everything I needed and FR footed the mount and balance as part of the GVWR increase.
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Old 09-04-2015, 10:41 AM   #27
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We've been waiting since June for Forest River to find a location near Southern California where we are staying to have this upgrade done.
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2011 Berkshire 390-rb-40, upgraded tires and front axle airbags, 2012 Jeep Wrangler 2 door, Blue Ox baseplate and BlueOx aladdin tow bar, Blue Ox Patriot brake system, wiring run through right frame rail and homemade led taillight bar.FB.
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Old 09-04-2015, 10:48 AM   #28
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We've been waiting since June for Forest River to find a location near Southern California where we are staying to have this upgrade done.

FR HIGHLY prefers to have the upgrade done at either Gaffney, SC OR their own plant in Elkhart. This is because, those two locations know of this over weight issue and are better prepared to fix it.

At least that's the story. Maybe it's just cheaper for FR if they use one of those two locations?

I took mine to Elkhart from AZ and I spent $500 on fuel for the whole trip. Still, for 6 new tires (the existing ones were three years old) I think I came out OK.

Boowho??
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Old 09-04-2015, 11:03 AM   #29
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We don't want to ride across country in an overweight coach. We grew up on the East coast and have no desire to go back. Also lately we have seen a couple of RV's stopped at portable spot truck inspection / weigh points here in Southern California and don't want to push our luck. We were back to the factory in late 2012 for issues that a dealer didn't fix and don't want to do it again.
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Ham KG5LTL.
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Old 09-04-2015, 11:38 AM   #30
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Well sent off an e-mail to Randy and received a reply within 20 mins. He is requesting a weigh in for the coach but stated that they could do the mods in S.C. Yippy-KI-Yay !
Joe; I cannot guide you for aluminum wheels; I will stick with the steel ones. However, it would be in your best interest to have the aluminum wheels put on at the same time as your new tires. It will save you $$$
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