235/85R16 KM2 on NRC7578 ? - Defender Source
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  #1  
Old August 12th, 2012, 08:10 PM
maleger
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Marc-Andre Leger
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235/85R16 KM2 on NRC7578 ?

I scraped, sanded and cleaned. Then I put on Tremclad oil based primer rust inhibitor and Tremclad oil based rust inhibitor black glossy paint. So about 4 half days of work and less than 100$ of supplies later, my NRC7578 riveted wheels look pretty good I think. So I need to get tires.

Looking here and googling various sites, I think I can put 235/85r16 BF Goodrich mud terrain KM2. BTW, my truck has a 2' lift and 1.25 inch wheel spacers and extended wheel arches should be here in a few days.

I wonder if anyone here is running a similar setup ?

The issue is that these tires are rated for 6" rims, but the NRC7578 are 5.5F (what ever the F means). It seems that some people in Australia are running the KM2's on these rims. I was considering using tubes as well. These are intended for off-road and for my project to travel to central and south america.

Considering the price of 7 tires (rear spare and hood mounted spare), I'd like to get other opinions before I make a mistake.
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  #2  
Old August 13th, 2012, 09:43 AM
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Riveted wheels must be used only with tubes and Bias-Ply tires. Radial tires (BFG KM2) must NOT be used with tubes.

You are welcome to stop by at home if you ever come down south all the way to Argentina.

Cheers,
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  #3  
Old August 13th, 2012, 10:03 AM
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You can use them. They are a bit narrow, but work fine with that size.
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  #4  
Old August 13th, 2012, 10:07 AM
maleger
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There seems to be a lot of diverging opinions on the subject. I know that the rims are intended to be used with tubes, I wanted to use tubes with radial tires.
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Old August 13th, 2012, 10:12 AM
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Chris Solis
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I'm in the same boat, what's the reason? Also are you saying you can't use radial tires with these rims or you can't use tubes with the radials?
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  #6  
Old August 13th, 2012, 10:23 AM
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Quote:
Originally Posted by El Solis View Post
I'm in the same boat, what's the reason? Also are you saying you can't use radial tires with these rims or you can't use tubes with the radials?
Right, air may go out through the rivets with the consecuencies we all know. And Radials just don´t have to be used with tubes. A tire dealer near you can explain you why, I just don´t know how to put it right in english.

5.5" wheels can be used with 235/85-16 but only the welded ones and if they are the new tubeless ones better yet (Defender 2006+)
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  #7  
Old August 13th, 2012, 10:28 AM
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Quote:
Originally Posted by defeyago View Post
Right, air may go out through the rivets with the consecuencies we all know. And Radials just don´t have to be used with tubes. A tire dealer near you can explain you why, I just don´t know how to put it right in english.

5.5" wheels can be used with 235/85-16 but only the welded ones and if they are the new tubeless ones better yet (Defender 2006+)
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can't you put silicone over the rivets to seal them and then mount the tire as normal?
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  #8  
Old August 13th, 2012, 10:32 AM
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The primer and paint should be plenty to seal up the rivets. That said, the rivets don't really leak. I just had my Rostyles galvanized and a couple of them are rivetted. Now they are sealed forever.
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  #9  
Old August 13th, 2012, 12:19 PM
maleger
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Quote:
Originally Posted by defeyago View Post
Right, air may go out through the rivets with the consecuencies we all know. And Radials just don´t have to be used with tubes.
I'm not too worried about air leaking by the rivets. With primer and 2 coats of oil based paint, I think it's pretty safe. I could always add a coat of gasket silicon to seal it completely.

When you say that radials don't have to be used it tubes, but can they ?

I was told before that you can use them, but you don't have to: Big difference.
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  #10  
Old August 13th, 2012, 12:25 PM
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You can use tubes in radials but why bother?
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  #11  
Old August 13th, 2012, 12:47 PM
maleger
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Quote:
Originally Posted by flippedrover View Post
You can use tubes in radials but why bother?
In this case to reduce the chance to air leaking via the rivets on the old style wheels.
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  #12  
Old August 13th, 2012, 02:25 PM
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Run them tubeless. They will be more reliable than with tubes. The rivets do not leak in my experience.
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  #13  
Old August 13th, 2012, 02:42 PM
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You can paint the inside if you think they will leak. I am running Michelin XCL (old ass tubeless only) tires without tubes on my steel rims and cruise 90+mph no problem.
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  #14  
Old August 13th, 2012, 08:21 PM
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If it is a tube type rim then it does not have the bead safety lip on the inside of the wheel to help keep the bead in place. I know a lot of people run the tube type rims with out tubes, radials even, and say they have no problems. However, if you get low on air and take a good corner or use it off road the chance of sudden air loss is possible. They do make radial tubes if you want to run radials in a tube type rim.
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  #15  
Old August 13th, 2012, 10:59 PM
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If you have ever broken a bead on one of these rims, you will know they are many times harder to break than a "normal" modern safety bead rim. It is not to worry about...
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  #16  
Old August 13th, 2012, 11:25 PM
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Well, when I was making the decision, I called Mike at ECR to ask how wide I can go on the Stock NAS 110 wheels. He said you can pretty much put anything on there without a problem. After hearing that, I went ahead and ordered the 305 BFG MTs I was looking at. They went on without a problem and its been wearing them for about a year and a half now.
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