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Zweiblumen · 06-02-2009, 02:32 PM

Thank you all for your time.
Here is the real reason for the question, airliners request that the valve is removed when transporting a bike on a jet. The reason given is to prevent the tire/tube from exploding in-flight. An average mountainbike tire/tube is supposed to be inflated 55-85 psi (depends on type of tire) and narrower tires have higher rating (100+ psi). One can ride a bike down to 20-30 psi so I was trying to figure out the pressure "increase" at 40.000 feet for reference.
BTW Redlemon when measuring airpressure in tires (or balloons) it's the diffrence in pressure outside and inside that is beeing measured so a balloon inflated to 1 psi at sealevel has total 15.7 ps (1 + 14.7)

Yours
ZB

06-02-2009, 02:32 PM	#5 (permalink)
Zweiblumen Insane Location: at home	Thank you all for your time. Here is the real reason for the question, airliners request that the valve is removed when transporting a bike on a jet. The reason given is to prevent the tire/tube from exploding in-flight. An average mountainbike tire/tube is supposed to be inflated 55-85 psi (depends on type of tire) and narrower tires have higher rating (100+ psi). One can ride a bike down to 20-30 psi so I was trying to figure out the pressure "increase" at 40.000 feet for reference. BTW Redlemon when measuring airpressure in tires (or balloons) it's the diffrence in pressure outside and inside that is beeing measured so a balloon inflated to 1 psi at sealevel has total 15.7 ps (1 + 14.7) Yours ZB __________________ Sodomy non sapiens. : I'm buggered if I know