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Old 01-11-2014, 03:15 PM   #1
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A question on Class A Tire conversion

Hello. I have a class A 1977 Xplorer 307 motor home. It has 8R17.5 tires on it and I want to change them over to 16" tires. I have a set of 16" Ford ambulance rims that will fit the existing bolt pattern. Does anyone know what size would fit the RV safely for this RV? Has anyone done this before?

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Old 01-11-2014, 05:09 PM   #2
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Why would you want to go to a smaller rim? 17.5" are better.
What is your front GAWR? That will help you determine what 16" tire you'd need, if you really want to.

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Old 01-16-2014, 01:23 PM   #3
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Because the 17.5 tires are way to expensive and if I ever got a flat, I could get a 16" tire easier than the 17.5. The weight, i'm not sure.
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Old 01-16-2014, 01:54 PM   #4
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I would very highly recommend staying with the manufacturers OEM tire and size. Their is an obvious safety issue here. Don't jeopardize your life or the lives of others on the road. JMO but well thought out!
Clay & Pebble.. Miss Butter our sweet Goldie (Jan. 2005-Jan. 2015) Sissy our Border Collie
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Old 01-16-2014, 02:25 PM   #5
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17.5" to 16"

From everything I read the 16" wheels won't clear the brakes and the load range on most 17.5" tires is higher then on 16" tires. I found a web site that might have some wheel/tire conversion ideas for you. Southwest Wheel Company Steel and Aluminum Truck Wheels
2004 Holiday Rambler Imperial PST
2014 Honda CRV
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