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Bad combo? Are they really tubeless?

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  #1  
Old 10-23-2009, 07:18 PM
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Default Bad combo? Are they really tubeless?

Well I put a new set of wheels on my wife’s bike.
A guy who does some work on bikes, how much knowledge I’m not sure.
He tells me that the front wheel and tire assembly could be dangerous.
The issue is should the tire run low air pressure that the tire could break bead.
It’s a Ride Wright Wheel, 21x3.5, with a MH90 21 tire and tube.
I bought both together. Ride Wright said it would work and mounted it.
Is there a problem?

Here’s something else I thought I’d through in as we’re talking about wheels.
Both DNA and Ride Wright sell these wheels as tubeless.
I went through it with a friend of mine and now the same problem with my wheels.
The vulcanizing done on the inside of the wheel is not air tight and is the same stuff on both wheels. Also it crumbles apart after a few hundred miles. I think it’s like work hardening or something and won’t hold air. The rear wheel on my wife’s bike came with no tube. It was mounted by Ride Wright. It wouldn’t hold air from day one so I put a tube in it. My buddy put DNA wheels on his bike and both front and rear went flat within a few hundred miles. When we took the tire off, the compound used to seal it was like falling off and crumbly.
Anyone else have the same problems?
How can they continue to promote them as tubeless?
 
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  #2  
Old 11-18-2009, 04:05 PM
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MH90 is a narrow tire for a 3.5" rim. You'd get a better fit with a 120.
 
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Old 11-18-2009, 04:11 PM
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A friend has the 21x3 DNA and has had no problems running tubeless for over 10K miles with a 90/21. The 21x3.5 is really wide for a 90/21.
 
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Old 11-18-2009, 05:04 PM
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Gorgeous bike! I cannot understand how any spoked wheel can be made tubeless. BMW do with some of their bikes, but the spokes are installed in the edge of the rim, outside the tyre bead. I would take the tyres off, clean the rims and fit tubes.
 
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Old 11-18-2009, 11:08 PM
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You have a tube - I am confused.
Spoked wheels can be made tubeless if the inner rim is sealed to the outer rim. The bad news is you can never replace a spoke niple.
If they are using anything but a weld, I would stay away or tube it.
...gene
 
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