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Old 03-07-2016, 07:45 PM   #43
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I have about ⅝" clearance on the curb side front wheel after trimming the 2015 23D wheel opening to match the street side opening before I could install the 15" SenDel T03-56545T wheels (identical in looks to the 16" SenDel T03-66655T wheels on my Classic) with the Michelin LTX (P) 235/75R15 XL tires. There is about a 30% safety factor at the derated 1,983 pound capacity of these tires. The 16" tires would probably rub on our 23D. The excessive capacity might be too stiff a ride for the lighter 6,000 GVW of the 23D & 23FB.

After extensive modifications to our 23D the left rear carries the heaviest load at 1,360 pounds.
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Old 03-07-2016, 08:12 PM   #44
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What is the Item or Part number for the SenDel 16" wheels? Switz had T03-66655T as the Part Number. Is that it?

Sounds exactly what I need, but no one has mentioned the wheel ordering number.

What can I expect to pay for a set of FIVE wheels?
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Old 03-07-2016, 08:32 PM   #45
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Sounds like 5/8" is a little close for comfort. A little gravel and you would be rubbing. What do you mean by a little trimming. What is being cut? (wheel well)? Would a person with a 23" be better off with staying with 14" tires and wheels?

Dave
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Old 03-07-2016, 09:45 PM   #46
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The curb side wheel well front opening had nearly 2.5" between the edge and the vertical upright face of the plastic wheel well. The street side had that extra metal removed. I have about an inch of clearance on street side front and ⅝" clearance curb side between the front outside corner radius of the tire (virtually no tread to hold a rock in that area) and the closest metal of the trim strip around the wheel well.

Here is the link to the SenDel wheel catalog page for this design used by Airstream.

http://www.sendelwheel.com/wheels/t03sm

Five of these 16" wheels cost just over $610 with freight and sales tax in Arizona at a local Discount Tire store in Mesa, AZ. Five Michelin LT225/75R16/E LTX M/S2 tires (P/N 05681) were just over $1,187 with installation and taxes at a local CostCo in Mesa,AZ.

These SenDel wheel's center hole allowed the use of the OEM stainless steel center hubs in both the 16" six bolt pattern and 15" five bolt pattern to line up with the 10#" brake drums on the 23D.

Note that the SenDel 15" wheel for the six lug nut 12" drum brakes of the 25' and longer Airstream trailers is T03-56655T.

I have installed the Centramatic wheel balancers on all three Airstreams we have owned. Here are the appropriate part numbers:

Centramatic Part Numbers for Airstream use:

14" 5 bolt pattern #200-221 standard part

15" 6 bolt pattern #200-221 Special

16" 6 bolt pattern #300-356 all "A" plates

We attach these wheels with McGard 24138 Chrome Cone Seat Wheel Locks and McGard 64010 Chrome Bulge Cone Seat Style Lug Nuts (1/2" - 20 Thread Size) phone 800-444-5847 or from Amazon.

We installed the Dill 1506-453 TPMS wheel senders for both the Classic and the 23D. Since the sender is completely inside the tire, make sure the sender's identifier letter is clearly marked on the outside of the tire so you can put the receiver chip in the correct slot of the display.
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Old 03-07-2016, 10:16 PM   #47
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Paid about $590 delivered and CA sales tax for five 16 inch aluminum wheels couple months ago. Got the Sendel S20-66655T. Purchased from Trailer-Wheels.com. This the same wheel Airstream uses for the Internal Serenity I have in 15 inch.
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Old 03-08-2016, 05:23 AM   #48
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Here are some pics of the current clearance on my 34'. Plenty of room for any size tire I want on the rear axle. Front axle is different story. I only have about 1" with the factory 15" and 225/75's

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Clearance in the actual wheel well is plenty. But even an upgrade to 16's is going to cost me a little material removal. This is the area you may or may not have to clearance:

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I have a brand new set of HWT series 04 16" wheels. They are brand new never used but I bought them used. Paid $425 for all 6. I can buy Michelin tires at a discount thru my work. We have a corporate account with a fleet. I think I am going to run the 225/75/16 over the 235/75/16. The larger ones will need a lot of clearance from on the wheel well. I end up having to cut a solid 2"-3" out. Plus the smaller more common 225/75's are cheaper. I can get them for $160 a piece.
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Old 03-08-2016, 06:28 AM   #49
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Originally Posted by excellaf350 View Post
. . .
I can buy Michelin tires at a discount thru my work. We have a corporate account with a fleet. I think I am going to run the 225/75/16 over the 235/75/16. The larger ones will need a lot of clearance from on the wheel well. I end up having to cut a solid 2"-3" out. Plus the smaller more common 225/75's are cheaper. I can get them for $160 a piece.
Which Michelins are you thinking of getting? The new Defender LTX M&S perhaps? The narrower 225's will have better traction in sloppy conditions IMO, but your proposed size is not listed at Tire Rack:

https://www.tirerack.com/tires/tires...nder+LTX+M%2FS

Here are the Discount Tire sizes:

http://www.discounttire.com/dtcs/tir...yp=Truck%2FSUV

Thanks,

Peter
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Old 03-08-2016, 06:38 AM   #50
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That link no longer shows a 15 or 16 tire in the proper size if I am reading correctly.
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Old 03-08-2016, 06:39 AM   #51
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Originally Posted by avionstream View Post
That link no longer shows a 15 or 16 tire in the proper size if I am reading correctly.
From what I can see also, you are correct. excellaf350 may have a different model tire in mind (with the correct load and speed ratings also).

The bind for our FC20 single axle is getting a high enough load rating (as de-rated if necessary) for the 5,000 lb. gross weight. If we have to skip the M&S tread to get Michelins, so be it . . .


Edit -- there are so many tire threads -- here is a collection of links FYI.

The Tires sub-forum table of contents has a number of threads listed, including some on the second page:
http://www.airforums.com/forums/f438/

Other threads not in the Tires sub-forum:
http://www.airforums.com/forums/f465...-a-127087.html
http://www.airforums.com/forums/f465...es-143822.html

Here is the Centramatics thread FWIW:
http://www.airforums.com/forums/f465...ad-129161.html
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Old 03-08-2016, 07:23 AM   #52
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The 5,000 pound axle requires two tires rated greater than 2,500 pounds load capacity, so the 15" Michelin LTX (P) 235/75R15 XL tires, even the replacement model coming soon, lack the necessary load capacity. The 16" Michelin LT225/75R16/E LTX M/S2 tires have a load rating of 2,680 pounds versus the 2,540 pound rating of the stock 15" GYM ST225/75R15D tires.

Note that the GYM ST225/75R15D tires are 28.3" in diameter while the 16" Michelin LT225/75R16/E LTX M/S2 tires are 29.2" in diameter. So they are slightly less than Ĺ" wider on the radius for checking if there is enough clearance at the front of the wheel well trim. Since the trailing arm suspension moves up and back on bumps, closer fitment at the front of the tire could be tolerated.
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Old 03-08-2016, 07:44 AM   #53
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Quote:
Originally Posted by Ray Eklund View Post
What is the Item or Part number for the SenDel 16" wheels? Switz had T03-66655T as the Part Number. Is that it?

Sounds exactly what I need, but no one has mentioned the wheel ordering number.

What can I expect to pay for a set of FIVE wheels?
I got mine from king of wheels in calif, no freight at my door for 115$..
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Old 03-08-2016, 07:48 AM   #54
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I wouldn't automatically assume you can go from 14" to 16" wheels and they'll fit. For sure do some measuring using a friend's 16" wheels and tires.

A 15" upgrade may be more appropriate.
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Old 03-08-2016, 08:01 AM   #55
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Quote:
Originally Posted by OTRA15 View Post
Which Michelins are you thinking of getting? The new Defender LTX M&S perhaps? The narrower 225's will have better traction in sloppy conditions IMO, but your proposed size is not listed at Tire Rack:

https://www.tirerack.com/tires/tires.jsp?tireMake=Michelin&tireModel=Defender+LTX +M%2FS

Here are the Discount Tire sizes:

http://www.discounttire.com/dtcs/tires/michelin/product/byName.do?r=COSINT&tmn=Defender+LTX+M%2FS&typ=Truc k%2FSUV

Thanks,

Peter




My bad. I was considering the 235/85/16 over the 225/75/16. Its a taller tire to give me a little extra ground clearance. Having some scraping issues getting out of my driveway currently.

I can get the 225/75/16 Michelin LTX MS/2 for $160 each. the 235/85 is $171

I think I'm sticking to the 225/75/16 it will make for less material to clearance from my front wheel well.

there is another option in there the 215/85/16 at well... its slightly larger than the run of the mill 225/75 but not as big as the 235/85. and I am talking about the LT tires here not any P model. decisions decisions

I don't think brand matters as much. Seems like a lot of Airstream owners tend to flock to the same thing. Michelin makes a good tire but You can buy other brands with just as good of a tire for a lot less $$$. I can get a deal on Michelins that's only reason I would get em. for a guy like me? I will never wear the tire out im not a full timer and don't run 20k a year. Maybe 2500 a year tops.
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Old 03-08-2016, 11:00 AM   #56
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Thanks switz. I believe another FC20 has done the 16" swap consistent with your advice. Will double check.

Peter
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