Deflating Tires Between Rides
08-19-16, 08:13 AM
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Wut?
08-19-16, 08:17 AM
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08-19-16, 08:17 AM
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1) Why would you think this might be necessary?
2) No.
2) No.
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08-19-16, 08:53 AM
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Too much pressure in the tires might wear them out if left in all the time? I'd think the constant stretch/relax of letting the air out every time would cause more stress, that and you'd wear out the valve faster too.
08-19-16, 08:59 AM
#9
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My buddy left fully inflated tires on his bike while stored in the backseat of a car one day. It was very hot that day & one tube popped. Now he deflates a little if leaving in the backseat.
08-19-16, 09:33 AM
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Only "rapid unscheduled deflation", but those are usually on the ride itself. 
Last edited by rm -rf; 08-19-16 at 09:37 AM.
08-19-16, 09:37 AM
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I also let a little air out of the tires if I'm going to leave the bike in a hot car. I've had tires blow off the rim when I didn't do that. Otherwise no, I don't deflate. Over time, they deflate themselves so I always pump before a ride.
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08-19-16, 09:42 AM
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Always kept hard between rides to hop on for a quickie.
08-19-16, 10:04 AM
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I've been in races when I wished my tires would deflate. But unless I need to take the tire off the rim, I don't see any reason to deflate a tire.
08-19-16, 10:08 AM
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08-19-16, 10:10 AM
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BITD it was SOP to drop the pressure of high end silk tubulars after riding to ease stress on the fabric. I'm not saying that there's a good technical reason for this, just that it was common practice. For my part, I never bothered since the tires would lose pressure overnight anyway. ASFIK - this practice was limited to light tubulars, and was not common with anything else.
However, dropping pressure a bit is different from deflating, and if you store bikes on their wheels, you may have the opposite issue. You need to keep the tires inflated to at least 20psi or so so they keep their shape. Long term storage standing on a flat tire will have the sidewalls take a set, and may cause stress cracking of the rubber when inflated round.
However, dropping pressure a bit is different from deflating, and if you store bikes on their wheels, you may have the opposite issue. You need to keep the tires inflated to at least 20psi or so so they keep their shape. Long term storage standing on a flat tire will have the sidewalls take a set, and may cause stress cracking of the rubber when inflated round.
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08-19-16, 10:25 AM
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I only use pure nitrogen. This is because air has a lot of moisture in it, and if you're descending and braking a lot, or just going really fast, when the tire casing heats up to 200 degrees (where the rubber is most efficient), then the pressure will increase dramatically and you'll have a bad day.
But because my rim tape is permeable to gas phase ammonia it's also likely some moisture can get through as well (even being air tight). So every so often I vacuum purge them and add fresh nitrogen. But not every ride. I'm not crazy.
But because my rim tape is permeable to gas phase ammonia it's also likely some moisture can get through as well (even being air tight). So every so often I vacuum purge them and add fresh nitrogen. But not every ride. I'm not crazy.
Last edited by jtaylor996; 08-19-16 at 10:38 AM.
08-19-16, 12:24 PM
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I don't deflate/reinflate. In fact, I've always been annoyed by air leakage from my tubes between rides.
My solution was building a pressure chamber in my living room that allows me to store my bike in an environment with 110 psi air pressure. That way, nothing leaks from my tubes and it saves me the trouble of having to use my floor pump a couple times per week.
My solution was building a pressure chamber in my living room that allows me to store my bike in an environment with 110 psi air pressure. That way, nothing leaks from my tubes and it saves me the trouble of having to use my floor pump a couple times per week.
08-19-16, 12:25 PM
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I don't deflate/reinflate. In fact, I've always been annoyed by air leakage from my tubes between rides.
My solution was building a pressure chamber in my living room that allows me to store my bike in an environment with 110 psi air pressure. That way, nothing leaks from my tubes and it saves me the trouble of having to use my floor pump a couple times per week.
My solution was building a pressure chamber in my living room that allows me to store my bike in an environment with 110 psi air pressure. That way, nothing leaks from my tubes and it saves me the trouble of having to use my floor pump a couple times per week.
08-19-16, 12:31 PM
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I don't deflate/reinflate. In fact, I've always been annoyed by air leakage from my tubes between rides.
My solution was building a pressure chamber in my living room that allows me to store my bike in an environment with 110 psi air pressure. That way, nothing leaks from my tubes and it saves me the trouble of having to use my floor pump a couple times per week.
My solution was building a pressure chamber in my living room that allows me to store my bike in an environment with 110 psi air pressure. That way, nothing leaks from my tubes and it saves me the trouble of having to use my floor pump a couple times per week.
08-19-16, 12:42 PM
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HOWEVER, there is an easy solution. You're near the Great Lakes, yes? I'd recommend a stationary barge anchored far enough offshore that you can suspend your bike beneath the barge at a depth equivalent to 230 psi of pressure. Roughly, that should be just under 500 feet deep. Should do the job and save you the trouble of building an extension on your house for a bigger chamber.
08-19-16, 12:56 PM
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BITD it was SOP to drop the pressure of high end silk tubulars after riding to ease stress on the fabric. I'm not saying that there's a good technical reason for this, just that it was common practice. For my part, I never bothered since the tires would lose pressure overnight anyway. ASFIK - this practice was limited to light tubulars, and was not common with anything else.
However, dropping pressure a bit is different from deflating, and if you store bikes on their wheels, you may have the opposite issue. You need to keep the tires inflated to at least 20psi or so so they keep their shape. Long term storage standing on a flat tire will have the sidewalls take a set, and may cause stress cracking of the rubber when inflated round.
However, dropping pressure a bit is different from deflating, and if you store bikes on their wheels, you may have the opposite issue. You need to keep the tires inflated to at least 20psi or so so they keep their shape. Long term storage standing on a flat tire will have the sidewalls take a set, and may cause stress cracking of the rubber when inflated round.
