Heidenau puzzler

[seniorasi]

Originally Posted by ultane

Use steel valve stem caps with the rubber insert so that they form an airtight seal when screwed down securely on the valve stem. Otherwise the centrifugal force of the wheal spinning can open the schrader valve enough to let air escape when at highway speeds.




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I would think the opposite is true! CF would cause the valve to seat more fully.

[marcus-st12]

My buddy had a rear heidenau replaced by the company cause it leaked air thru the sidewall itself....little bubbles coming thru the sidewall. They replaced the tire.

[feldjäger]

Originally Posted by Yeahbaby

Have you checked the valve stem itself. This year on the highway north from Yakima, I was running normal speeds minding my own business. I had a sudden deflation of a brand new tire. WTF, When I stopped I could find no nail or punctures. Couldn't figure it out. When I brushed my hand against the valve stem, voilà. Found the problem. Not a split or tear on the valve stem rubber a one would think. The metal stem de-vulcanized from the surrounding rubber. With the remaining air in the tire, it actually was spit out on to the ground. Yes, I have witnesses! Try to explain that one. So for now on, every 2nd tire will get a new valve stem.

Had this happen to me as well. Not fun forking out money for a new tire either.

[scooteraug02]

Call this guy http://www.advcycleworks.com/ if it isn't the valve stem.

He thinks Heidenaus are perfect and has probably mounted 100s +