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Old 2016-05-23, 05:32 AM   #11
kamikaze
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Quote:
Originally Posted by harper View Post
They just don't want you to put a flat, fully deflated tube in the tire to mount it. It's easier when it is very slightly inflated and has a more or less round cross section. They just list 0.5 psi to get you to put some air in it to make it easier on yourself. Anyway, you're a clever guy with access to lots of stuff. You could borrow a Wallace and Tiernan pressure gauge from a lab in Karlsruhe and easily measure the 1.034 bar within a couple percent.
Intelligent, but not so clever.

I put the uninflated tube on the rim and inflated it to 1.5 bar. Then I kneaded it through and moved it around until the valve stuck out of the hole centred and I was confident the tension was pretty even. Inflate a bit more, repeat, a couple of times.

The interesting bit is that for a long stretch the pressure just stays the same. With every push on the pump the tyre is expanded permanently (instead of elastic stretching like a regular tube). That changes once the tube starts pressing against the walls.
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evening, rim, spoke, tension, tyre


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