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  #1  
Old 07-09-2016, 10:04 AM
redhawk redhawk is offline
 
Join Date: May 2008
Location: Boulder, CO
Posts: 198
Default Big Tires

Just curious if anyone out there has put "big" low pressure type tires on a 4 or 8 ? (Like a 26" Bushwheel on 6" rims)
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  #2  
Old 07-09-2016, 07:35 PM
gmrv4 gmrv4 is offline
 
Join Date: Oct 2013
Location: Kansas City
Posts: 16
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21 x 8 on 6" rims. Not quite the 26" you speak of.

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  #3  
Old 07-09-2016, 09:28 PM
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roadrunner20 roadrunner20 is offline
 
Join Date: Feb 2005
Location: Andrews, NC (KRHP)
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Not a 4 or 8, but Greg Arehart has a RV-9B(Big Tires)
He's a VAFer out of Reno, NV

Here's a link on the original discussion back in 2011.
http://www.vansairforce.com/communit...t=greg+arehart
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Last edited by roadrunner20 : 07-09-2016 at 09:33 PM.
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  #4  
Old 07-09-2016, 10:27 PM
rockwoodrv9 rockwoodrv9 is offline
 
Join Date: Dec 2011
Location: Meridian ID, Aspen CO, Okemos MI
Posts: 2,858
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There is a guy just south of Grand Junction on a private air strip that did a modification to his nose wheel. I spoke with him several times and he was very nice and willing to help others. He milled a new wheel bracket that increased the size of the tire by about 2" at least. I can't remember his name but he had a great web site showing all the work he did. I did a quick search now and couldn't find it.

Maybe someone here can remember who it is.

Edit: I found the site. http://mesawood.info/myrv7a/n67bt.htm

Bob did much more than just adding a larger tire but it is very interesting to look at his work. He is quite a craftsman.
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  #5  
Old 07-10-2016, 03:51 PM
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grubbat grubbat is offline
 
Join Date: May 2012
Location: Ga
Posts: 718
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Gary,
Can you share the tire and tube name?
Do you have any vibrations in the wheel assembly on take-off or landing?
Do you have gear leg stiffeners?

I have the 6" Matco wheel assemblies for RV but the wheels are drilled for the TR-87 90deg tubes. The problem is that the new tundra 8:50-6 4ply tires by Dresser requires the 8:50-6 tubes which are only made with a TR-20 straight valve stem and will not work with the Matco wheels. The largest TR-87 tube I could find is an 8:00-6 so that is the size I'm going with. Now I need to find a tire in 8:00-6. Any info is appreciated.
Thanks!



Quote:
Originally Posted by gmrv4 View Post
21 x 8 on 6" rims. Not quite the 26" you speak of.

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RV-3 Sold
RV-4 Sold
1968 Twin Comanche - Sold
RV-6a Sold
1965 Comanche 260 - Sold
RV-9 Built and Flying
600A Aerostar - Sold and regretted
2000 Maule MXT-7 Project
1965 Maule M4 Bushwacker projectů till RV-15 shows up
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  #6  
Old 07-10-2016, 06:05 PM
gmrv4 gmrv4 is offline
 
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Location: Kansas City
Posts: 16
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Here you go:

http://www.desser.com/Aircraft-Tires...00-6-4-PLY.asp

http://www.desser.com/Aircraft-Tires...00800-6-AL.asp

I do have a slight vibration on takeoff due to slight imbalance. It only last a few seconds if I let the tires spin down on their own after takeoff. It is just barely noticeable so I don't think much of it. I might tap the brakes to stop the rotation and all is good.

I do have gear leg stiffeners. Helicopter tape on the flaps. 12lbs of air works nicely. Lands like a big pillow. Slightly higher step up to get on the wing walk. Better prop clearance. Cost me 11 MPH. I can convert back to 5.00-5 and wheel pants in about 4 hours. My conversion has endeared me to no one. Cub guys know that I am not a Cub and RV guys just think I slowed the thing down. I have had a blast going to lots of back country strips in this config.

All my parts are Cleveland 6" components. I use an 1 1/2" axles as a sleeve over the 1 1/4" axles to provide fitment for the 6" Cleveland parts. Don't know much about Matco stuff. HTH.
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  #7  
Old 07-10-2016, 07:40 PM
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grubbat grubbat is offline
 
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Location: Ga
Posts: 718
Default Thanks

Good info Gary. Thanks!
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RV-3 Sold
RV-4 Sold
1968 Twin Comanche - Sold
RV-6a Sold
1965 Comanche 260 - Sold
RV-9 Built and Flying
600A Aerostar - Sold and regretted
2000 Maule MXT-7 Project
1965 Maule M4 Bushwacker projectů till RV-15 shows up
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  #8  
Old 07-11-2016, 12:14 AM
redhawk redhawk is offline
 
Join Date: May 2008
Location: Boulder, CO
Posts: 198
Default Big Tires

Hi Gary,
Have you also thought about putting on a larger tailwheel?
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  #9  
Old 07-11-2016, 07:04 AM
gmrv4 gmrv4 is offline
 
Join Date: Oct 2013
Location: Kansas City
Posts: 16
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Yes.

I have looked at various options but so far haven't come up with a solution that I like. Either too heavy, cumbersome, or involve a lot of fabricating. Bigger tires an hubs get heavy fast. However a bigger tailwheel would be something that I would be interested in.
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  #10  
Old 07-11-2016, 09:27 PM
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Infidel Infidel is offline
 
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Location: WV22
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Quote:
Originally Posted by gmrv4 View Post
Yes.

I have looked at various options but so far haven't come up with a solution that I like. Either too heavy, cumbersome, or involve a lot of fabricating. Bigger tires an hubs get heavy fast. However a bigger tailwheel would be something that I would be interested in.
The great thing about experimental....experiment and keep us updated!
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