Tire Upgrades Now Available for Coaches 443 and Newer - Luxury Coach Lifestyles
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Old 12-17-2008, 06:17 AM   #1
fulltiming
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Default Tire Upgrades Now Available for Coaches 443 and Newer

Newell News - December 2008

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Starting with coach 1230, we upgraded the standard equipment front (and tag axle) tires on new coaches from metric size 315 to 365. The larger tires provide a substantially higher weight capacity rating, 10,500 lbs. each for the 365 versus 9080 lbs. for the 315. In addition, the 365 tires have a recommended inflation pressure of 120 psi compared to 130 psi for the 315, providing a more comfortable ride. We also can approve a hgiher maximum cruising speed for the 365 tire, 75 mph compard to 65 mph for the 315.

The Newell Service Department has developed upgrade packages for previously-built coaches to replace 315 tires on the steer axle with 365 tires. The scope of the retrofit and cost vary depending on when the coach was built, as through the years our suspension and body have changed. Some suspension designs require only new tires and wheels, while later coaches also much have new wheel hubs and fender modifications. Coaches with the Porsche design front styling (one-piece windshield) require some body modifications.
If you would like to schedule a 365 tire upgrade for your Newell, please contact the Service Department for an appointment. Prices are $3,800, $16,000, or an estimated $19,000 depending on the coach number. The $3,800 price (wheels and tires only) applies to 1997 coach 443 through 2004 coach 696 (except 671, 681, and 685). The $16,000 price (wheels, tires, wheel hubs and fender modifications) applies to 2004 coaches 671, 681, 685 and to coach 697 through 2006 coach 775. Body modifications are also required for 2006 coach 776 through 2008 coach 1229 subject to verification of modifications needed at an estimated $19,000.
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Old 12-17-2008, 01:22 PM   #2
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Michael,

I have the 315s on my front axle presently, but I have 11R24.5s on the tag.

What is the big advantage in doing this upgrade? Is it a smoother ride? Safer front axle weights? I can understand that it would allow me to rotate my tires if I had 315s on the tag.

My front GAWR is 17,640# and it currently weighs 16,750 (with all of my stuff). So I am under weight.

Has anyone done this upgrade? Is there a big difference in the ride?
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Old 12-17-2008, 01:55 PM   #3
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This upgrade is for the steering axle only even though the new coaches come with the 365's on both the steering axle and the tag axle.

Benefits: Lower pressure (120 vs 130) so ride is improved, extra carrying capacity (although you seem to be OK on that one it does add extra safety margin), and an increase in recommended max cruising speed.

Since this upgrade has just been announced, few coaches have been modified yet although the new tire combination has been included on all 2009 coaches and up. It is a much more important upgrade for those with two slides up front since they are heavier to start with and have a small safety margin.
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Old 12-17-2008, 05:47 PM   #4
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Michael,

This brings up an interesting point: Newell recommends running 130 psi in my front tires which are 315/80R22.5. I realize that they are covering their butts and also that everyone loads a coach differently.

I had my coach weighed at Newell and the front axle weights totaled 16,750# or 8,375# per tire. The tire chart from the manufacturer shows a pressure of 121# for a single axle weight of 8,375. Actually, it shows 120# for 8,270# and 125# for 8,810# of weight. I just interpolated to arrive at the 121#.

So for my particular coach I should be running 121psi in the front tires. For safety I run 125# in the fronts. So it looks like for me, changing to 365s would be a waste of money.

I attended a seminar that Goodyear put on and they said that if you run a tire at less than 20% of its correct pressure you damage the sidewalls and should discard the tire and replace it with a new one!
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Old 12-17-2008, 07:43 PM   #5
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Tuga, it sounds like you are OK without the upgrade.

My coach came with 11R24.5 tires all around. Because I fill the enormous bays in my coach with 'stuff' since I live in my coach, I had a front tire loading problem. At Newell's recommendation, I switched to 305/75R24.5 tires on the front only. When it is time to replace the front tires due to age, I will move them to the tag and buy new ones. I will likely do that at about 4 years.

With the new quad slide Newell's putting so much weight on their front tires, Newell recommends moving the steer axle tires to the tag axle every three years and putting on new steer axle tires.
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Old 12-18-2008, 12:35 AM   #6
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I apologize in advance for hijacking the thread, but I want to ask if any of you have seen anything like this. Last year I ran into a guy in about a 98 with two slides. I noticed that he was running the standard 11R24.5 truck tire on the rear and tag, but he was definitely running a 22.5 on the front. He said his front weighed in about 17k. I didn't have the opportunity to ask him if it came from the factory that way or had it been converted at a later date. I am aware that in the 22.5 size that Alcoa makes a rim rated for much more than 7000 pounds and several manufacturers make 22.5 tires that will rate out as much as 9000 pounds. Did I really see that or am I imagining that I did?

I haven't gone to the trouble of measuring the rotors and brakes to see if there would be clearance problems, but if indeed that is a possible solution, then I wonder why no one has mentioned it?
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Old 12-18-2008, 12:43 AM   #7
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Richard,

My coach has 11R24.5s on the drive and tag axles and 315/80R22.5s on the front axle.
As far as I know, it came from the factory with those size tires.

I don't know what the Alcoa rim ratings are but the Toyo tires have a maximum rating of 9090# at 130psi @ 65mph each when used as a single on the front axle. I am pretty sure that the Alcoas are rated for 9,000# but I will check tomorrow and let you know.
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Old 12-18-2008, 12:56 AM   #8
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Yes, when Newell went to slide outs a number of the coaches went to 22.5" wheels on the front. This upgrade is 100% 22.5" wheels and tires. As the coaches continued to get heavier, the conversion was to 22.5" wheels and tires on all axles.

I doubt that my coach front brakes would accept 22.5" rims. By 1997, Newell changed that. You notice that the 'upgrade' is not available for pre-1997 coaches.
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Old 12-18-2008, 02:07 AM   #9
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Well thank you to both, I'll go tell Rhonda that despite her observations, I am not losing my mind.

Yep, there is probably a brake interference issue with the pre 97 rigs that gets in the way of such a straight forward solution.
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