Bike on plane: Deflate tires?
12-01-06, 09:48 AM
#51
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Originally Posted by jccaclimber
Ok, so, your tires are actually at a LOWER pressure.
12-01-06, 10:34 AM
#52
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Yes, that is correct. The altitude will only change it be around 13psi whereas heating your rims on a long winding descent would cause more of a pressure difference.
12-01-06, 11:09 AM
#53
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Originally Posted by urbanknight
Right, so I would assume the same happens in a bike tire. The air expands as the ambient pressure decreases. The only question was to what degree does that air pressure. According to Nobrainer, it's not more than 15 degrees, which I believe is less than some tires expand due to brake friction heating the rim (and thus the air inside the tire), so it shouldn't be a problem. I'll fly with them slightly deflated just to be safe, especially considering one should inflate tires before every ride anyway.
Adding one more atmosphere to a valve (shampoo bottle cap) that isn't designed to hold even one extra atmosphere will cause it to leak. Heck, even driving from Denver (5280') over Vail Pass (~11,000') will cause a shampoo bottle to leak. You learn this stuff the hard way around here
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Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
