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 > 22.5 vs 19.5 tires

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wa8yxm

Wherever I happen to park

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Posted: 06/13/18 05:50am Link  |  Quote  |  Print  |  Notify Moderator

As stated 19.5 you get a spare. 22.5 you don't (Generally)
Better ride, More ground clearance. HIGHER PRICE.

But I'd not want 19 inchers on my RV. I'm very happy with mny 22.5's

And as for the spare...

I helped a friend change one once. I'm a big and fairly strong dude (6;2 cand lift 250 pounds) and loading that flat into his pickup.. That was right at my limit. I'd not want one pound heavier. In fact that was like 7-9 years ago and I'm not sure I'd want to attempt it today.

So a Spare would not do me any good. Just be one more tire to replace.


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Hikerdogs

Wisconsin

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Posted: 06/13/18 11:03am Link  |  Quote  |  Print  |  Notify Moderator

Our 2001 Adventurer came with 19.5" tires. Our 2013 Adventurer has 22.5" tires. The 2013 rides much better and the tires are lasting longer. Along with that there is far less road noise.

We currently have about 36,000 miles on our 2013 motorhome, and the tires still look like new. We replaced the tires on our 2001 at 47,000 miles. They probably should have been replaced a few thousand miles earlier.

As mentioned with the 22.5" tires you won't get a spare tire. We purchased a spare and leave it unmounted under the bed.


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2013 Winnebago Adventurer

Dale.Traveling

Newport News, VA

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Posted: 06/13/18 01:27pm Link  |  Quote  |  Print  |  Notify Moderator

I think any potential ride performance gain with 22.5" tires on a 22K lbs. F53 chassis will due to the lower air pressure needed for the same weight. A quick look at the inflation tables and the pressure drop could be as much as 15 PSI comparing a 22.5 to a 19.5.

If you do decide to go with the 2016 Sunstar the big gain, if the chassis has is also a 2016, will be the 6 speed transmission.


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Doc15

Arkansas

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Posted: 06/16/18 09:39am Link  |  Quote  |  Print  |  Notify Moderator

wa8yxm wrote:

As stated 19.5 you get a spare. 22.5 you don't (Generally)
Better ride, More ground clearance. HIGHER PRICE.

But I'd not want 19 inchers on my RV. I'm very happy with mny 22.5's

And as for the spare...

I helped a friend change one once. I'm a big and fairly strong dude (6;2 cand lift 250 pounds) and loading that flat into his pickup.. That was right at my limit. I'd not want one pound heavier. In fact that was like 7-9 years ago and I'm not sure I'd want to attempt it today.

So a Spare would not do me any good. Just be one more tire to replace.


Doc15

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Posted: 06/16/18 09:43am Link  |  Quote  |  Print  |  Notify Moderator

I'm with you.... The only way I would move from 22.5 would be if I could trade up to 24.5 and no typical Diesel Pusher will have that..I have 3.5 million miles on me, "that's why I look like 40 miles of bad road" and I want some meat between me and the asphalt.

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south

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Posted: 06/16/18 01:03pm Link  |  Quote  |  Print  |  Notify Moderator

You're only talking about raising coach 1.5 inches from rim height alone.
The tires will be quite a bit taller though, I think.
I would call the Factory Rep and quiz them about it.
It was an option of it doesn't change the rolling diameter too much only a speedo change might be needed. A diesel not problem gas engines?

dubdub07

Colorado Springs

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Posted: 06/16/18 01:18pm Link  |  Quote  |  Print  |  Notify Moderator

Tire size is dictated by the tires size, not the rim size. A 275 is the same height regardless of rim size. A 19.5 will usually have a 245 tire and a 22.5 uses a 275. That is your difference in height. I can't see much of a difference other than your gearing is affected negatively with more diameter.

Will


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DrewE

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Posted: 06/16/18 02:05pm Link  |  Quote  |  Print  |  Notify Moderator

dubdub07 wrote:

Tire size is dictated by the tires size, not the rim size. A 275 is the same height regardless of rim size. A 19.5 will usually have a 245 tire and a 22.5 uses a 275. That is your difference in height. I can't see much of a difference other than your gearing is affected negatively with more diameter.

Will


Tire size specifications do not directly measuring outside diameter, nor sidewall height, though both are defined by it. A 275/80 R22.5 tire has a tread width of 275mm, an aspect ratio of 80% (the ratio of the width to the sidewall height), and an inside diameter of 22.5 inches. The overall diameter would be 22.5 inches plus twice 80% of 275mm, which works out to 39.8 inches once all the unit conversions are done. A 245/75 R19.5 would have an overall diameter of 34 inches, for comparison sake, about a 15% difference.

Tire sizes are rather strange in that they combine a metric measurement, a unitless ratio, and an imperial measure.





Yellowboat.

Auburn, WA

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Posted: 06/16/18 03:10pm Link  |  Quote  |  Print  |  Notify Moderator

I went from a 2005 Sightseer to a 2016 Sightseer. The 2005 had 19.5 tires and the 2016 has 22.5 tires. The 2016 handles so much better than the 2005. White knuckle driving has been greatly reduced. That said I have the new 2016 five speed transmission chassis so it is difficult to say how much the bigger tires help in handling.


2016 Winnebago Sightseer 33C on a 2016 Ford F53 Chassis
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