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Open Roads Forum  >  Class A Motorhomes

 > tire size question

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Goldencrazy

madison wi

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Posted: 02/14/12 03:43pm Link  |  Print  |  Notify Moderator

I currenty have 19.5 inch tires on my 2012 winnebago vista 30T. I notice the 32 ft models in both Vista and sightseer have the 22.5 inch tires. My 19.5 seem small and I think the chassis on the other are the same as mine. Could I put the larger tire on mine or were there be many other things to change? What difference would larger tires make. I already have the Kelderman so my ride is fantastic and the roadmaster reflex and tiger trac bar provide great stabiity and tracking. Can I do it and is there an advantage?

bsinmich

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Posted: 02/14/12 04:05pm Link  |  Print  |  Notify Moderator

Axle ratios, transmission gearing, wheel clearance in the wheel wells and everything else near the wheels would have to be changed. There just is not enough room for those on your MH. You may also need a ladder to get up into the MH. You are much better off with what you have. I wish I didn't have the 6 steps up to mine. We both have problems with steps.


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Ames

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Posted: 02/14/12 04:14pm Link  |  Print  |  Notify Moderator

I agree with bsinmich


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rgatijnet1

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Posted: 02/14/12 04:29pm Link  |  Print  |  Notify Moderator

Since you say that the ride is fantastic with your 19.5 tires, why would you want to go to a more expensive tire? There are many things that would be affected but probably the most expensive may be the new axles and brakes, to match the larger wheel bolt pattern.

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Posted: 02/14/12 04:45pm Link  |  Print  |  Notify Moderator

I wondered. We changed my tires/wheels on the Smart Car from 15 to 16 inch and the ride improved in terms of stability and we made no other changes. Of course the bolt pattern was the same and we had enough room in the wheel wells to do it. At any rate I don't need to do it but curious.

Fiesta

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Posted: 02/14/12 05:04pm Link  |  Print  |  Notify Moderator

19.5" tires and wheels are cheaper than 22's.
I and most people can change a 19.5 but not a 22.
Would a 22" ride and handle better?
Would there be enough fender clearance?
22"'s are heavier so you could up with reduced MPG.
Correct Inflation pressure is more important than size.
Why change??

ArchHoagland

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Posted: 02/14/12 11:55pm Link  |  Print  |  Notify Moderator

Tires would be, ballpark $3,000. Wheels would be, ballpark $2,000.
I don't know if you would get $5,000 worth of improvement.

I'd put that 5 grand in the fuel tank and see the USA


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Scott & Jill

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Posted: 02/15/12 10:14am Link  |  Print  |  Notify Moderator

I think when you change the tire size that also affects the speedometer?


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eadeal55

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Posted: 02/15/12 11:14am Link  |  Print  |  Notify Moderator

the main reason why you have 19.5in tires on your 30T and the 32K,35F and 36D ft models have 22.5in tires is the chassis GVWR. The 30T only has a 18,000lb chassis, where the 32K has a 20,500lb chassis. You could probably put 22.5in tires on your 30T, since the actual MH body probably has the same dimensions in the wheel wells, but not too sure what the real benefit that would be.

I've been riding on 19.5in tires for 7 years and 25K miles now, and for my 20,500lb chassis, its been a good smooth ride. I look forward to trading up to a 36ft MH in the next year or so with a 22 or 24K lb chassis, and 22.5in tires...


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J-Rooster

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Posted: 02/15/12 12:04pm Link  |  Print  |  Notify Moderator

Bob, you can take your coach to a knowledgeable tire shop and they can give you the spec's that you need (clearance etc.) and the cost for free. I've owned both and prefer 22's due to you have more tire on the road surface and you ride a little higher. IMHO if you can afford it go with the 22's! It will change your speedometer, but if you decide to go with 22's look at what speed your driving with the 19's and what RPM's your at! The speed will change, but the RPM's will not and you'll learn how to drive with your tach. In my coach I don't care what the speedo is reading. I drive at 1900 RPM's because that's the sweet spot that I get the best milage for my coach.

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