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Old 01-24-2015, 05:20 PM   #15
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I too just bought a set for our 20FC and after a trip out to Palm Springs during Christmas, I couldn't believe how well they worked. Our tires were cool to the touch compared to without the CMs. I also had a problem with outside tire wear and had the axel aligned as well as new tires. I'm very happy with the smooth ride now.


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Old 02-04-2015, 04:01 PM   #16
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I'm adding this valuable info here:

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Originally Posted by switz View Post
We also put the Centramatics on both Airstreams and the truck. Note there are two sizes that apply to Airstreams. One is for 15" wheels and the other is slightly larger for the 16" wheels.

Model 200-221 Special is for 15" wheels

Model 300-356 all A plates is for 16" wheels.
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Old 02-04-2015, 04:34 PM   #17
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Interesting I called and ordered my Centramatics from the factory yesterday . I was was told 200-221 special fit both 15" and 16 " Airstream configurations.
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Old 02-04-2015, 05:48 PM   #18
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Bump so I can find this again


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Old 02-04-2015, 09:10 PM   #19
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Question

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Interesting I called and ordered my Centramatics from the factory yesterday . I was was told 200-221 special fit both 15" and 16 " Airstream configurations.
This info was posted on their website too. I will PM Switz and ask him to clarify for us. It would be great to here from Centramatics about it too.

The other model is clearly for 6 lug 5.5 bolt pattern 16 inch rims.
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Old 02-04-2015, 10:10 PM   #20
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So.. I am NOT very smart... but, here is what I did.

Mounted new tires... stopped the tech and insisted on 'balancing' the tires... (he said 'we normally don't on a trailer!) Once home...Put some dry beans in a saucepan on the floor, headed to highway. Just before entering the highway (state hwy), then dropped my iPhone into the 'pan' after starting a 'video'. Drove about 2 miles, stopped and recovered the iPhone...

Watching video could see there was a lot of 'vibration'... and rattling beans in the pan.

Took AS home, installed centramatics... repeated above video.... HUGE improvement and smoothness...

No.. it wasn't 'Memorex'....
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Old 02-05-2015, 03:25 AM   #21
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We bought the Model 200-221 Special (for 15" wheels) and installed them on our 16" Sendel T02 wheels and LT tires; and they fit fine.

CWF, interesting test. So simple; wish I had thought of doing that when I first installed the Centramatics. All this time, I have been operating on faith that they actually worked. Nice to see that you have proven that on your Airstream.
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Old 02-05-2015, 06:53 AM   #22
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Like Phoenix, sorta, I already had the 220-221 Centramatics on my OEM 15" wheels. When I got the 16"ers, I just installed over the 220-221s. The fit fine. The 300-356 ones are just a larger diameter, which allows for effective dynamic balancing at a lower speed than the smaller diameter. As I recall the mfr states that, by design intent, the balancers start becoming effective at about 35 mph. So the difference is the 220/221s will not be effective until a few MPH higher than the 300-356s. I could do the math, but it's early.
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Old 02-05-2015, 07:58 AM   #23
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Thumbs up

I'm not very smart either....I just rode in the AS.

If you try it you'll have a much better understanding of why bad things happen.

This is not us......
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Old 02-05-2015, 08:06 AM   #24
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Quote:
Originally Posted by dznf0g View Post
Like Phoenix, sorta, I already had the 220-221 Centramatics on my OEM 15" wheels. When I got the 16"ers, I just installed over the 220-221s. The fit fine. The 300-356 ones are just a larger diameter, which allows for effective dynamic balancing at a lower speed than the smaller diameter. As I recall the mfr states that, by design intent, the balancers start becoming effective at about 35 mph. So the difference is the 220/221s will not be effective until a few MPH higher than the 300-356s. I could do the math, but it's early.
Math ya gotta be kidding me. This here is the internet only half truths, speculation, innuendo's, fish tales.... no math science or facts please The internet never lets the facts get in the way of a good story, kinda like the press.

Makes sense. Good to know they have been installed on 16" by other with no problem.
Thanks
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Old 02-06-2015, 02:46 PM   #25
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I went ahead and pulled the trigger on the 300-356 today because I actually like math.
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Old 02-09-2015, 11:42 AM   #26
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I'm not very smart either....I just rode in the AS.

If you try it you'll have a much better understanding of why bad things happen.

This is not us......
Thanks for taking one for the Team.
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Old 02-09-2015, 01:43 PM   #27
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if you order, make sure your put special because I got the regular and they do not fit. they are going to swap them out for me. Good company.
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Old 02-18-2015, 01:22 AM   #28
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I put CM's on S & the TV. I had ordered the 220-221 when I had 15" wheels, but I upgraded to 16" wheels with Michelin LTX225/75R16(E) tires. CM told me that the 220-221 would work fine, and they do.

My TV is a 1999 Dodge Ram 2500 diesel, which has discs in front and drums in the rear. There had always been vibration in the rear, possibly due to the drums being oout of balance. With the CM's, the ride is totally smooth. Without the AS in tow, on the AZ I-10 (limit 75mph), there is absolutely no vibration.

This past summer was the big upgrade (after a GYM blowout) - new axles (increased rating from 4,000 lbs ea to 4,500 lbs ea), new 16" Sendel wheels and Michelin LTX225/75R16(E) tires, Centramatics and Dill TPMS. Recently changed the hitch receiver on the TV from the OEM Class IV to a Titan Class V. I'm carrying a bit more weight in the front of the AS, as I changed my 4 90Ah AGM batteries for two 4D AGM's (totalling 420Ah), which weigh 135lbs each.
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