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Old 11-01-2007, 05:32 PM   #1
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Maxxis Tires Now Running

Well as of last night we officially are riding on Maxxis ST E rated tires. We took the Classic 25 miles to its inside storage home after getting the wheels back on, and will roll it back home this weekend in prep for our Florida trip.

So far no observations other than the auto repair guys who mounted the tires ignored my request to inflate the tires to 75 psi (they filled them to 65). So at this point based on the Maxxis inflation chart their capacity is the same as my old D rated Marathons. I'll get that extra 10 lbs in next week.

The E's are 10 ply rated with 2 belts polyester, 2 belts steel, and one belt nylon for the tread. The side walls are 2 belts polyester. Looks like the ride was OK. Upon arrival I didn't notice anything being out of place or any drawers open. So for now nothing of note regarding ride quality within the trailer or the tow vehicle itself.

We got the set for $360 from a small outstate tire dealer. My neighbor brought them home for me. Locally the auto repair charged me $15 each to mount, balance the new tires and dispose of the Marathons.

Jack
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Old 11-01-2007, 08:08 PM   #2
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I'm running Maxxis UE168's on my 34' Avion. They had E rated in 225/75-15, but they were too small in diameter. I run the 235/75-15. They fit, but fillup the wheelwells. The Avion has swing arm suspension so it worked OK, I'm not sure if there'd be enough clearance on torsion type suspension, but I figure there would be.

Anyway, I've got about 1700 miles on them to date and they're doing just fine.

The UE168 is an LT tire but is also rated ST. It's a commercial truck tire basically, with three ply sidewalls (it really has three plies, even though it's rated as 8 ply). I don't notice the ride being too harsh.

With the triple axle, even at "just" load range D, I've got about 50% extra capacity with these tires. So far so good.

Best of luck with your's,
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Old 11-01-2007, 08:14 PM   #3
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We have about 8,000 miles on our Maxxis E's. We run them at 70 psi on a 2005 25FB. So far, so good after three blow-outs on the OEM Marathons.
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Old 11-02-2007, 04:07 PM   #4
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When I had brake/bearing/tire failure last week on the way to VA., I stopped by the Goodyear place in Kingsport, TN. and they had Maxxis D rated in stock but would have to have the Marathon brought over from another store. I had them mount the Maxxis and it did fine for the next 1,000 miles of the trip.
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Old 11-22-2007, 12:25 AM   #5
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Well we put 1,700 miles on the new tires in the last 12 days. All seems well, I ran them at 75 psi. Tires ran cool the whole way down and back. Went through heavy rain today from Nashville back to STL. Tires seem to stick well. No abnormal inside disarray. Went through some rough roads in Birmingham and Montgomery Alabama. Found some drawers in the kitchen slid open, but I had that with the Goodyears.

I'll tell you I have a much greater level of comfort knowing I using E rated tires now. I'm hoping for many more miles of trouble free towing. For those unwilling to move up to the LT tires and 16 inch wheels, these tires seem to be a good compromise.

Jack
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Old 02-17-2008, 09:48 PM   #6
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For a while now, I've come to the conclusion that these are the right tires for my trailer. I was bored this evening and did a search on nylon caps on tires...I found this interesting:

So, Do You Need a Nylon Cap? - TIME

In Jack's case, he had actual tread seperation if I recall correctly. A number of us have said our Marathons blew out. I don't think (read, I'm not sure) the Marathons have a nylon cap to them FWIW.

Here is another article on nylon caps I found interesting:

Drivers.com: TV program slams Goodyear over tire
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Old 02-17-2008, 10:17 PM   #7
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nope marathons don't have nylon caps...

we spent a bit of time on this issue last summer...

before jc made the switch following the branson rally.

http://www.airforums.com/forums/f438...ion-34105.html

see posts 64-68...

thanks for the reminder twink,

i'll be updating a tire thread soon too...

cheers
2air'
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Old 02-18-2008, 06:11 AM   #8
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Maxxis Tires

After owning a SOB fifth wheel for a few years and having a couple of tire blowouts, I became more sensitive to tire quality. When I bought my 2002 A/S last fall and it still had the original tires on it, I decided to replace them immediately with what I could determine as the best ST tire. I chose the Maxxis 10 ply trailer tire and haven't had any problems yet after 2,000 miles. Time (and miles) will tell. And I do check the inflation regularly and keep speed down to help avoid tire overheating.
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Old 02-18-2008, 08:11 AM   #9
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From what I understand, the rims on my 2004 Safari and similar rims installed on other trailers within the Airstream fleet have a 65psi maximum rating. Given my weight, the 8plys are more than enough, unless, I do any upgrading to the Safari...but then again, even if I got new axles rated for 7000lbs(vs my 6000lb ratings) the 8ply would still be more than enough.

Now I don't know and can't say for sure what the max pressure in the Classic style rims was in 2004 or if the different rims now offered by Airstream in the Classic line. I do know that the non Classic lines, the newer style rims still have a 65psi rating.

Why do I say all this? Well, to get the full weight load benefits of the 10ply you would need have the tire at 80psi. Now my first reaction to this was, "it's a rim, how could 15psi make that much difference to a rim?" But then, I realized I was talking like a non-engineer (which I'm not an engineer), so there must be some reason why the rims I've described can only be inflated to 65psi. Now I'd be somewhat concerned buying 10 ply tires and keeping them filled to 65psi. To me couldn't that cause more heat buildup due to a bit higher rolling resistance? Also, I'm no mathmatican, but if you do buy the 10 plys and only fill them to 65 psi, how much of the stated weight can the 10 ply tires at 65psi carry over the 8 ply tires at 65psi? Enough to justify the additional cost of the 10ply tires overall (not just in my situations, because in my situation, clearly with my weight, even if I do lots of mods, could not touch that of Jack's slide out unit).

I had first thought of going with the 10ply from the standpoint that my Safari may be my last RV and I've been doing upgrades and planning upgrades for it, thus increasing the weight. But then when I saw the rims could only handle 65psi, I started to condsider simply going with the 8ply tires now and if need be, looking at upgrading the rims to either the Classic, which hopefully could handle the higher pressures or simply a properly sized rim that could, if I found I added significant more weight to the Safari doing upgrades and adding some carry on things (read being less concerned with what I pack).

For now, there won't be that much more weight added to my Safari until I swap out, or should I say, if I swap out the countertops to a corian type product. I think there, would be my biggest weight addition. Still the 10ply is appealing for an added layer of protection...any comments on any of this?
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Old 02-18-2008, 01:59 PM   #10
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the discontinued alcoa rims are rated for 95psi, not 65.

http://www.airforums.com/forums/433671-post3.html

the alloy rims on safaris/ccds are similarly rated 90-100 psi.

the wheel/rim specs should be stamped on the BACK SIDE of the wheels.

only the tires themselves are 65psi cold inflation.

during towing (especially in warm weather) the tires pressures can and do rise as high as 75 psi.

cheers
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Old 02-18-2008, 02:06 PM   #11
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Thats interesting because when the factory had the new style Safari rims for sale on eBay, they listed the rims as 65psi max. Additionally the factory had my style rims, the discontinued Safari type rims and they also listed them as 65psi rims. When I had asked about it, they confirmed that both were in fact 65psi rims. I'll have to look at the back of mine to say for sure. Clearly the tires I've had on both the Bambi and Safari were the same size and both 65psi. I had never heard of a rim that was only rated to 65psi. I have no idea what the Classics run, in terms of max PSI, but this is all new to me, I'm just picking things up before I make my final selection on number of plys per tire.
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Old 02-18-2008, 02:21 PM   #12
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Quote:
Originally Posted by Silvertwinkie
... When I had asked about it, they confirmed that both were in fact 65psi rims...
i'm not surprised someone might tell ya this...

but there are so many specs to keep sorted, it's very easy to confuse which rating is which...

tires...

ply rating, load rating, cold inflation pressures, blow off pressures...

wheels....

load rating, pressure rating, offset, lug torque specs, lug spacing....

valve stems...

pressure rating, length, diameter...

and so on.

but spec'ing a wheel with NO pressure capacity above the tire wouldn't be wise....

typically the blow off rating for tires is nearly 2x the cold inflation figure, and the rims need to tolerate this too....

when alcoa/as started using the 5 spoke 'classic' style rim, most goodyear marathons they used were cold inflation rated to 50 psi...

so 95 is ~ 2x that figure....

for the discontinued 5 spoke alcoas, the pressure rating and lug torque are the same figure, 95.

cheers
2air'

zoom zoom posted this page from the service manual with wheel sizes and lug nut torque specs,

it IS worthwhile to link again, and copy this page, i think....

http://www.airforums.com/forums/atta...1&d=1154447011

originally posted here; see post # 81-86...

http://www.airforums.com/forums/f465...uts-24644.html
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Old 02-18-2008, 02:50 PM   #13
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Have a 20' 2007 Safari and one of the first things I did after I bought it was to replace the Goodyear Marathons with Maxxis. Having had Marathon tire problems on another trailer I didn't want a repeat with the AS. Anyway before doing so I called Airstream and asked what tire pressure the aluminum rims on my trailer were good for. The person I talked to pulled the engineering drawings and told me they were rated at 85 lbs. BTW I run my Maxxis at 70 lbs which is 5 lbs over the Marathon. Only reason for using more that I can see is if you wanted to try and carry more weight which would then exceed the axle rating.
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Old 02-18-2008, 03:31 PM   #14
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Eric, I remember the 2004 Classic wheels were rated 85 lbs or so. While your wheels are rated for 65 lbs. consider that they probably will carry higher pressure since 65 lbs. cold will be higher that that on a hot tire. I ran my tires at 75 lbs. on the trip to Fl. in November and did not detect any temperature issues even though max inflation on that E rated tire is 80 psi.

You do raise a good question as to whether a D rated tire at 65 psi runs cooler than an E rated tire at 65. Maybe an email to Maxxis could help you out there. To be honest though if I were in your shoes, I wouldn't have any concern regarding the D rated Maxxis. You still get the benefits of the cap on the tire. Based on your trailer weight, technically the D rated tire inflated to 65 psi has a lot of reserve built into it.

Jack

The question that begs to be answered is how much that wheel has in reserve to cover the pressures associated with 65lb. cold tires vs. a tire that is inflated to say 70 psi. I wish I was privy to that info.
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