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05-24-2011, 01:05 PM
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#1
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Rivet Master 
1984 34.5' Airstream 345
Foothill Ranch
, California
Join Date: Mar 2010
Posts: 4,695
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Alcoa Alloy wheel Spec?
Was offered a set of Alcoa wheels, but I now know they were not right...
What is the size and width for future reference?
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05-24-2011, 04:40 PM
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#2
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Rivet Master 
1982 28' Airstream 280
Port Angeles
, Washington
Join Date: Aug 2008
Posts: 1,943
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The early P-30 is 19.5"x6". The lug bolt circle is 7.25" and the center hole is 5.25" and off set is 5.08". The rear axle has 10 lug nuts and the front has 5 lugs. I'm not sure what the tag uses.
If you run across a set you don't want, I'm looking for some.
Cheers, Dan
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05-24-2011, 07:22 PM
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#3
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Rivet Master
1989 34.5' Airstream 345
Jamestown
, Kentucky
Join Date: Aug 2009
Posts: 577
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The Tag should use the same wheel as the drive axle.
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03-14-2013, 02:45 PM
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#4
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Rivet Master
1984 34.5' Airstream 345
Foothill Ranch
, California
Join Date: Mar 2010
Posts: 4,695
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I know this sounds wacky at first, but finding 19.5" Alloys is too darned hard... yet 22.5's are pretty common.
Now, the 22.5's are not available with our 7.25 PCD...
Anyone ever seen an adaptor?
Oh, and before anyone says it...
A 225/70 R19.5 and a 225/70 R22.5 tire is pretty close on rolling diameter
About 2 revolutions per mile difference.
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03-14-2013, 03:54 PM
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#5
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Rivet Master
1982 28' Airstream 280
Port Angeles
, Washington
Join Date: Aug 2008
Posts: 1,943
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Quote:
Originally Posted by Keyair
I know this sounds wacky at first, but finding 19.5" Alloys is too darned hard... yet 22.5's are pretty common.
Now, the 22.5's are not available with our 7.25 PCD...
Anyone ever seen an adaptor?
Oh, and before anyone says it...
A 225/70 R19.5 and a 225/70 R22.5 tire is pretty close on rolling diameter
About 2 revolutions per mile difference.
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Try these guys. Rickson Wheel Manufacturing
This is the spec. and they have them.
__________________
Cheers, Dan
________________________________________
"Socialist governments traditionally do make a financial mess. They always run out of other people's money. It's quite a characteristic of them."
~ Margaret Thatcher ~
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03-14-2013, 06:06 PM
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#6
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Rivet Master
1993 33' Land Yacht
Midland
, Michigan
Join Date: Sep 2005
Posts: 508
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I think Rickson wheel sold out to another company, that doesn't offer aluminun wheels any longer.
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03-14-2013, 06:13 PM
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#7
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Rivet Master
1982 28' Airstream 280
Port Angeles
, Washington
Join Date: Aug 2008
Posts: 1,943
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Quote:
Originally Posted by gloran
I think Rickson wheel sold out to another company, that doesn't offer aluminun wheels any longer.
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I don't know about that but the web site is still up.
__________________
Cheers, Dan
________________________________________
"Socialist governments traditionally do make a financial mess. They always run out of other people's money. It's quite a characteristic of them."
~ Margaret Thatcher ~
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03-17-2013, 06:25 AM
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#8
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2 Rivet Member 
1989 37' Airstream 370
Louisville
, Kentucky
Join Date: Jul 2007
Posts: 33
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Keyair
You may need to check your math the 22.5 is 3 inches larger. With the same width and aspect ratio that makes the overall diameter 3 more inches. The real problem you will likely run into is Clearence. The 22.5" wheels are also wider than the standard 19.5's. After 3 blowouts in 3 trips I looked at this option but found it would be impossible without major body modifications.
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03-17-2013, 11:00 AM
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#9
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Rivet Master
1984 34.5' Airstream 345
Foothill Ranch
, California
Join Date: Mar 2010
Posts: 4,695
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Hi Oliver!
Wow, a 370 owner!
Impressive!
I agree width could be an issue, but here are the specs for a 225/70 R19.5 tire and a 225/70 R22.5 tire.
Bob Dickman Tire Center - Motorhome Tires » Tires by Size
Both sizes quote a 6 to 6.75" rim width too.
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03-17-2013, 04:01 PM
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#10
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Rivet Master
1993 33' Land Yacht
Midland
, Michigan
Join Date: Sep 2005
Posts: 508
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Keyair, I thought your 345 all ready had alloy wheels on it? I've been looking for some time and haven't been able to locate any either.
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03-17-2013, 04:07 PM
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#11
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Rivet Master
1984 34.5' Airstream 345
Foothill Ranch
, California
Join Date: Mar 2010
Posts: 4,695
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Nope, just steelies with chrome covers... 
Interesting news is that I called a place friday who say they are tooling up for a steel adaptor for this conversion. They said later this year production will start.
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03-17-2013, 05:07 PM
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#12
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2 Rivet Member
1989 37' Airstream 370
Louisville
, Kentucky
Join Date: Jul 2007
Posts: 33
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I think that may be a mistake. To My knowledge the lowest profile 22.5 is a 255/70r22.5. That tire is @ 37" in diameter the 225/70r19.5 is @ 32". If you do find a 33"-34" 22.5 let me know because I have 10 new 22.5 Alcoas ready to put on.
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