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Old 03-22-2008, 01:09 PM   #15
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Quote:
Originally Posted by ticki2
... Why is it repeatedly said that trailer wheels must be min of 2600# rated when many original tires were not near that?
because MISTAKEN info has a life of its own and will not die.

the alcoa wheels a/s used for well over 10 years (until 2006) were only load rated to 2200 lbs each.

these 2200 lb rated rims were used on the classics from 25 ft up to the triple axle 34....

including the 30 ft double axle SLIDE models with a gvwr of over 10,000 lbs.

yes, that's 8800lbs of combined 'wheel rating' on a 10k+ trailer.

loads do shift and extra capacity is usually a good thing, BUT don't forget the WEIGHT of higher rated rims and heavier tires...

most of these recommendations for extra capacity rims ignore 3 issues...

1. 10-15% of the trailer weight is ON the tongue and not carried by the axle/hub/wheel/tires...

so in the '4,000 lb trailer' example, that's ~ 500 lbs tongue mass and 875 lbs at each wheel/tire statically.

2. load shifting happens, BUT it's not the same as a vehicle with the wheels at the corners,

cornering/turning causing very little weight shift and braking actually UNLOADS the trailer wheelsntires...

IMPACT from bumps/holes/rails is important but it is NOT the same as overloading stresses.

3. the EXTRA unsprung weight from heavier tire/wheel packages can negatively affect trailer ride and add VIBRATION inside the trailer.

so i'd suggest caution with moving to a higher rated tire/wheel package IF it's much heavier, or STIFFER than oem specs...

on really old units moving from steel rims to an alloy usually results in LESS weight and better ratings,

which is 2 good things, but pay attention to tire mass increases from going up in size or ply rating.

cheers
2air'
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Old 03-22-2008, 01:30 PM   #16
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2air , that explaination is close to what I have gleaned so far in all the dicussions of tires and wheels . I have not been able to determine the rating of original '76 alum wheels, anyone happen to know?
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Old 03-22-2008, 02:10 PM   #17
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Quote:
Originally Posted by ticki2
I understand that logic , but what good would it do if the tire was not equally rated ?
The tire is a dynamic thing. It moves and flexes and changes shape. All of that is considered in the rating. The tire will take the momentary overload in it's design. Also a tire wears out over a very short period of time. The rim will be on the vehicle for decades. It's life expectancy is far longer. And a rim does not flex any way near what a tire will flex.

You coukd ask the same q about the axle and for that matter the frame. The weak point should be the tires. Tire replacement is far easier and cheaper than most other components.

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Old 03-22-2008, 02:18 PM   #18
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Quote:
Originally Posted by Area63
They should be 6in wide, with zero offset. That is if they are original.
They are original. I have read that going from a 6" to 7" wide rim is not a problem. Also based on the diameter of my current 15" 700 LT tire at about 29." and the Goodrich 16" T/A LT tire at 29.4" the tire size should be about the same. But the offset on these wheels may cause a problem for me and my 76 A/S. It would appear that I have more room to give toward the hub, -offset, as opposed toward the outside edge of the wheel well, + offset. I could be wrong.

I want to go wheel and tire shopping next week so thanks for all the help and input.

Don
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Old 03-22-2008, 05:14 PM   #19
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You coukd ask the same q about the axle and for that matter the frame. The weak point should be the tires. Tire replacement is far easier and cheaper than most other components.

>>>>>>>>>>>>>>>>>>>Action[/quote]

The axles are rated at exactly the GVWR minus the tongue weight , it is easily the weak link.
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Old 03-22-2008, 06:13 PM   #20
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I guess that would be a difference of opinion. I replace my tires way more often that the axles. If they had a better or same rating why do I replace tires so often.

And you are making a comparison of different ratings.

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Old 03-22-2008, 08:29 PM   #21
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Don, one consideration is whether to get clearcoated wheels or not. Although it may have change, when I was researching wheels, the Eagles were not clear coated. American Racing versions were clearcoated and have a reputation for being a top quality product. I'm glad I went with the AR's because polishing wheels is one job I can't get excited about.
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Old 03-28-2008, 10:46 AM   #22
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Quote:
Originally Posted by Bob Thompson
Bob I finally got the A/AS home and took off one of the wheels.

Here is what I was able to measure. With the current 700x15 LT tires with good thread the diameter of the mounted tire is 29 1/4"

On the rim I followed your instructions and with the wheel facing down the measurement from the bolt mounting surface to the nearest face of the straight edge is 4". With the wheel facing up the measurement from the bolt mounting surface to the nearest face of the straight edge is 3". So I assume that would be a +1/2" offset? If that's correct then the wheel does not appaer to be the org 15x6 0 offset.

Thanks

Don
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Old 03-28-2008, 05:04 PM   #23
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The Eagle Alloy wheels are on the way. Discount Tire ordered them for me with no shipping cost. They should be in next week and then will have the BF Goodrich commercial TA mounted, balanced and installed. Discount Tire has a chrome plated lug bolt that looks real good. The end looks just like a chrome lug nut. I might go with these rather than the studs and lug nuts.

Details and pictures to follow next week.

Don
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Old 04-05-2008, 11:08 AM   #24
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Quote:
Originally Posted by adonh
The Eagle Alloy wheels are on the way. Discount Tire has a chrome plated lug bolt that looks real good. Don
The 16" Eagle Alloy wheels and BF Goodrich Commercial TA tires have been installed. As it turned out Discount Tire did not have a chrome plated "Lug Bolt" that would work. So the wheel studs that I ordered were installed.

The 16" wheels and tires fit perfect on my 1976 31' Sovereign. No problems at all with clearances in the wheel well. The BF Goodrich tire is the same diameter as the old 700/15 LT tires that came standard on the 1976 A/S/.

Here some pictures of the installation.

As you can see by looking at the new tire next to the old tire they are right at the same height, about 29.4. The new tire is a little wider but did not pose a problem in fitting in the wheel well with room to spare. We installed the wheel studs with locktight red and used chrome lug nuts and wheel locks. There was quite crowd watching all of this at Discount Tire and everyone liked the end results.

Thanks for all of the feedback and input from everyone during this project.

I can provide full details on the tire, wheel and stud specs if anyone is interesed, just let me know.

Don Hardman
1976 31' A/S
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Old 04-05-2008, 02:04 PM   #25
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Quote:
Originally Posted by adonh
I can provide full details on the tire, wheel and stud specs if anyone is interesed, just let me know.

Don Hardman
1976 31' A/S
Please do. I'm about to do the whole basket on our Globetrotter; axles, wheels, brakes and tires.

Thanks,

Craig
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Old 04-07-2008, 10:47 AM   #26
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More details

Here are more details on the tires, wheels and wheel studs that I installed on my 1976 31' Sovereign. I am providing this for informational purposes for those that may be interested. There are many threads on wheels and tire choices and other members of this forum that can provide valuable input. So search and do your own research. This worked very well for me and my Airstream but may not suite your own Airstream.

The Tires are BF Goodrich Commercial T/A LT225/75R16/E. Adjust the PSI to match the weight of your trailer.

BFGoodrich Tires | Commercial T/A® All Season | Tire Sizes & Specs

The wheels are from Eagle Alloy
0589-7766 16X7 6 on 5.5 +8 offset

Eagle Alloy Wheels Series 058

My 1976 A/S had wheel bolts so I needed to convert them to wheel studs so that I could use the proper Chrome lug nuts. I got the 1/2" wheel studs from E-Trailer and also used Permatex Locktite Red High Strenght Threadlocker.

Replacement Wheel Stud, Screw-In, 1/2" x 2" 25-53 : Trailer hitch bike rack and trailer hitches - etrailer.com

I used Gorilla chrome lug nuts and wheel locks. The McGard lug nuts and wheel locks would also be a good choice.

As indicated there are other threads on this subject so search and do your own research before proceeding. This worked very well for me, but may not suit your Airstream.

Don Hardman
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Old 04-07-2008, 01:43 PM   #27
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Great! Thanks, Don. Much appreciated.

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Old 04-08-2008, 02:19 PM   #28
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The MB Wheels-72 are exactly what I was looking at for mine. (84 Soveriegn) Which ones did you finally go with and do you have any pics of the finished look?
I thought these would look great on mine, just got done giving the entire trailer a full polish (taking clear coat off).
Rolf



Quote:
Originally Posted by adonh
I am looking at the Eagle Alloy wheel 0589-7766 and the MB 72 wheels below that are Truck wheels. Both come in a 16" 6-5.5 bolt pattern with a 4.25 bore. The weight rating are in excess of 2600 lbs. Is there a problem in using truck tires on the A/S with the Goodrich commercial T/A tires.

Eagle Alloy Wheels Series 058

MB Wheels - 72

The other option is below which is a trailer wheel

Aluminum Trailer Wheel Style: SERIES #03 Size: 16 x 7 Bolt Pattern: 6 x 5.5 Bore Size: 4.25 Load Rating: 3200 lbs @ 80 PSI Offset: -8mm


Thanks Don
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