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Tire Question

 
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peteohms



Joined: 31 Oct 2007
Posts: 224
Location: Leander, TX

PostPosted: Sun Mar 15, 2009 11:53 am    Post subject: Tire Question Reply with quote

My kitfox III has stock tires on it. I believe they are 16X6.5X8. A friend
gave me a couple new 18X8.5X8 tires which are of course wider. Will they
fit the stock wheels?

Pete


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Pete
Leander, TX
Kitfox III, 912ul, Grove
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Tom Jones



Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA

PostPosted: Sun Mar 15, 2009 12:01 pm    Post subject: Re: Tire Question Reply with quote

Quote:
My kitfox III has stock tires on it. I believe they are 16X6.5X8. A friend
gave me a couple new 18X8.5X8 tires which are of course wider. Will they
fit the stock wheels?

Pete


Pete, 18X8.5X8 tires came with my Kit. I have the Douglas ATV wheels. I have also put some clown tires (Kingfox) tires on the same wheels. They are even bigger.


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Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA
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brianm(at)snolab.ca
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PostPosted: Sun Mar 15, 2009 5:08 pm    Post subject: Tire Question Reply with quote

I think they will work. I have ~100hrs on a set of 21x12x8 with are mounted
KF IV. I also just bought the same tires for the speedster that I am
building.
Brian

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rawheels



Joined: 09 Jul 2008
Posts: 89
Location: Westfield, IN

PostPosted: Tue Mar 17, 2009 2:12 am    Post subject: Re: Tire Question Reply with quote

So, help me understand this; The tire numbering system is radiusXwidthXplys, right? The original wheels were 6" wide, so how do you put a 8.5" or 12" wide tire on a 6" wide rim? Do you just get a smaller inner tube, or is it ok to use the wider tires because we never put in the full air pressure or something?

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Kitfox IV-1200
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Tom Jones



Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA

PostPosted: Tue Mar 17, 2009 6:45 am    Post subject: Re: Tire Question Reply with quote

Quote:
So, help me understand this; The tire numbering system is radiusXwidthXplys, right? The original wheels were 6" wide, so how do you put a 8.5" or 12" wide tire on a 6" wide rim? Do you just get a smaller inner tube, or is it ok to use the wider tires because we never put in the full air pressure or something?


Ryan, the original kitfox wheels are Douglas ATV wheels. ATV tire size is Tire outside diameter X Tire widest section width X wheel diameter. Tire width is commonly 2 to 4 inches wider than wheel width.

The Kingfox tires are 21 X 12 X 8. Yes that is pushing the width limits to put it on a 6 inch wide wheel. I took my Kingfox tires and Douglas wheels to the tire shop and asked the guy, "Will these tires work on these wheels". He said yup and mounted them.

When inflated the widest section of the tire is 9 inches. This combination of tires and wheels has been used on Kitfoxes for a while now and I haven't heard of any problems. Experimental has its advantages.


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Tom Jones
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503 Rotax, 72 inch Two blade Warp
Ellensburg, WA
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