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Old 03-27-2011, 09:39 PM   #141
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You are correct about the limits of the control arms but the discussion here is the installation of larger diameter tire. I have new axles on my trailer with 16 in. E range tires and the clearance while one of the axle is compressed is not generous.

Another thing to be mindful of is the wheel offset. Airstream uses a zero offset wheel as original equipment. The wheel commonly used to replace them when purchased not from the mother ship has a 1/4 in. offset which is about the limit for fender clearance especially on a tri axle when making a hard turn.
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Old 03-27-2011, 09:42 PM   #142
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Quote:
Originally Posted by moosetags View Post
Here is a better photo of the clearance on Lucy.

Brian

What brand are the rims and where did you purchase them?
Thanks,
Paul...
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Old 03-27-2011, 09:44 PM   #143
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I'm not sure what the brand is. I purchased the 16" wheel/Michelin Tire package at the Airstream Factory in Jackson Center.

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Old 03-27-2011, 09:58 PM   #144
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Wheel Offset

Quote:
Originally Posted by HowieE View Post
You are correct about the limits of the control arms but the discussion here is the installation of larger diameter tire. I have new axles on my trailer with 16 in. E range tires and the clearance while one of the axle is compressed is not generous.

Another thing to be mindful of is the wheel offset. Airstream uses a zero offset wheel as original equipment. The wheel commonly used to replace them when purchased not from the mother ship has a 1/4 in. offset which is about the limit for fender clearance especially on a tri axle when making a hard turn.
++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++
If you are using Dexter NevRLube wheel bearings, then a zero offset rim will lead to premature wheel bearing failure.
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Old 03-28-2011, 05:40 AM   #145
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Originally Posted by moosetags View Post
I'm not sure what the brand is. I purchased the 16" wheel/Michelin Tire package at the Airstream Factory in Jackson Center.

Brian
I found both styles of wheels sold at the factory at Tredit. I also priced ordering the wheels from them and buying the tires locally and it wasn't any cheaper than buying them from the Jackson Center and having them shipped. YMMV.
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Old 03-28-2011, 03:41 PM   #146
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FYI, I called Jackson Center (factory) and asked whether there would be enough clearance for us to go from 14" to 16" wheels (changing out axles too), and I was told that all Safaris, irregardless of year, have the same amount of space in the wheel well. I thought someone else might be wondering about this. So, my thinking is that the factory is changing out relatively new Safaris from 15" to 16" wheels, so finding out that they all have the same amount of available wheel well space enlightened us to the fact that we can safely change ours from 14" to 16".

However, someone above mentioned offset on the wheels -- I know nothing about this.

Also, the new axles are 12" rather than 10", does that change the equation?

Thanks.

Deb
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Old 03-28-2011, 04:09 PM   #147
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Quote:
Originally Posted by nickmeloy View Post
++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++
If you are using Dexter NevRLube wheel bearings, then a zero offset rim will lead to premature wheel bearing failure.
================================================== =======
The above post should read "If you are using Dexter NevRLube wheel bearings, then a non-zero offset rim will lead to premature wheel bearing failure."
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Old 04-12-2011, 03:47 PM   #148
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I finally installed my new 16" wheels. They fit just fine in the wheel well and the spare also fit the carrier.
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Old 04-12-2011, 04:31 PM   #149
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Data plate

Does anyone know if Mothership is issuing new data plates when they change folks from 15 to 16 at the factory, or if they change data plates when folks upgrade their axles there?

I wonder if JC would do that or not, or perhaps there may be some federal law that prevents them from doing that unless the modified/upgraded units undergo testing?

I upgraded mine to 16s a few years ago, have the axles next on the list, and would like to upgrade the data plate on the carrying capacity and tire PSI recommendations to match...
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Old 04-12-2011, 04:45 PM   #150
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Thats a close fit to the trim molding.

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Originally Posted by Wayne&Sam View Post
I finally installed my new 16" wheels. They fit just fine in the wheel well and the spare also fit the carrier.
Until you have a blowout or tread separation and rip the wheel well molding out along with the belly wrap.
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Old 04-12-2011, 05:19 PM   #151
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Until you have a blowout or tread separation and rip the wheel well molding out along with the belly wrap.
Well the difference between 15" and 16" won't change the destruction.
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Old 04-12-2011, 05:35 PM   #152
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Quote:
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Until you have a blowout or tread separation and rip the wheel well molding out along with the belly wrap.
That happens all the time with the 15" also. A half inch on both sides of center don't make a difference.
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Old 04-12-2011, 05:43 PM   #153
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Until you have a blowout or tread separation and rip the wheel well molding out along with the belly wrap.
I think that 15 inchers are just about as likely to cause body damage as 16 inchers if there is a catastrophic tire failure. The only difference is that catastrophic tire failure is probably quite a bit more likely with the 15 inch ST trailer tires.

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Old 04-13-2011, 02:53 AM   #154
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I second Moosetags' opinion. The tread coming completely off a 15-in Marathon did a pretty good job of tearing up the trim on our wheel well. And, while I suspect tread separation on a 16-inch tire would do about the same damage, I think it's extremely less likely to happen with the Michelin XPS Ribs we are now running.

Just a guess, but with both OEM Marathons and one of two Maxxis 15-inch ST tires failing from tread separation, all less than two years old and with less than 10,000 miles on them, that's a 75% failure rate, which translates to a 25% chance that these ST tires WON'T fail. Without any data on the XPS Ribs at all, that's a pretty low bar to clear; and I suspect that about any major brand LT tire could beat a 25% reliability rating.

I don't recall ever reading about any XPS Rib failures on this forum, at all (maybe a slow flat from a nail?).
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