Gauging Tire Pressure Without a Gauge
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Gauging Tire Pressure Without a Gauge
Any tricks to estimating tire pressure without a gauge? I pretty much pump my 115 psi rated road tires as hard as I can with my old-style frame pump, and check that they feel rock hard.
I'll be buying another frame pump for my wife, and have to decide whether I should get one that includes a gauge.
I'll be buying another frame pump for my wife, and have to decide whether I should get one that includes a gauge.
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Any tricks to estimating tire pressure without a gauge? I pretty much pump my 115 psi rated road tires as hard as I can with my old-style frame pump, and check that they feel rock hard.
I'll be buying another frame pump for my wife, and have to decide whether I should get one that includes a gauge.
I'll be buying another frame pump for my wife, and have to decide whether I should get one that includes a gauge.
Floor pumps with gauges can be had for $20 at your LBS....
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Any tricks to estimating tire pressure without a gauge? I pretty much pump my 115 psi rated road tires as hard as I can with my old-style frame pump, and check that they feel rock hard.
I'll be buying another frame pump for my wife, and have to decide whether I should get one that includes a gauge.
I'll be buying another frame pump for my wife, and have to decide whether I should get one that includes a gauge.
This is as close to having a portable floor pump as you're going to get.
#4
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Just get a gauge and be done with it.
The trick is feeling the tires and seeing if they feel firm enough. Worked great when I was a 100 lb kid riding around the block on balloon tires. It worked great because anything between 15 psi and 60 psi was still rideable under those conditions. But I'm not a 100 lb kid riding around the block any more.
The trick is feeling the tires and seeing if they feel firm enough. Worked great when I was a 100 lb kid riding around the block on balloon tires. It worked great because anything between 15 psi and 60 psi was still rideable under those conditions. But I'm not a 100 lb kid riding around the block any more.
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You might be able to calibrate your fingers so that you can get reasonably close by feel, but you'll have to get and use a gauge in order to learn what the proper pressure feels like.
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I can't accurately estimate tire pressure without a gauge. I don't know anyone who can. Motor vehicle tires, having much more volume, can be aired up until they "look about right" with no noticeable ill effects over the short term. Not so with bike tires.
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That still doesn't tell you how much pressure you're running. If it's so easy why do you use a pump with a gauge?
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Is there any documentation/data supporting the assertion that it is possible to accurately determine bicycle tire pressure by using only fingers?
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I couldn't care less that someone stuck a guage on the head.
Tho this thread isn't really about recommending favorite frame pumps... so sorry for the side-track.
Really, don't worry so much about getting the your pressure to match a specific number. Just adjust it till its comfortable. In the middle of a ride I'll sometimes stop and let a random amount of air out because the road's gone gravelly and I want traction, or put more in because its smooth and I want to go faster. Its not an exact science so don't worry about it.
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Got my road morph the other day. It shows that I was at 90 psi with my old style frame pump. I now have them at 120 psi, and the ride is much harsher on non-smooth pavement.
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Presta valves can't be checked that way. The only gauges I know of are on the pump. So if you go ahead and connect the pump to check the pressure, might as well pump it up to the right psi. If you're stranded with a flat and a frame pump, just get it to the highest PSI you can. If you're strong enough to pop a tube with a hand pump, a blowout in your face should be nothing.
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Please buy a good reliable gauge, not the cheapest, one in three good reading, gauge.
I use to have a cheapo gauge pump that would give erratic readings after a while, I ended up blowing a few tubes this way. Put down the cash for peace of mind...
I use to have a cheapo gauge pump that would give erratic readings after a while, I ended up blowing a few tubes this way. Put down the cash for peace of mind...
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Use a Presta/Schrader adaptor and a Schrader gauge. Works fine.
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I have one...none of my schrader gauges fit the adapter. My air compressor did, but my gauge couldn't get a read.
In any case, Presta valves are used for low volume tires anyway, so the usefulness of a gauge is kinda moot anyway. I've been a bit clumsy connecting the gauge to the valve, and by the time I get it on, I lost 20 psi. Even if I had a gauge, it would seem pointless.
Regarding the car tires...sure, temporarily, I see what you mean. You can eyeball it to get home, but it's better to be high than low. Except in snow.
In any case, Presta valves are used for low volume tires anyway, so the usefulness of a gauge is kinda moot anyway. I've been a bit clumsy connecting the gauge to the valve, and by the time I get it on, I lost 20 psi. Even if I had a gauge, it would seem pointless.
Regarding the car tires...sure, temporarily, I see what you mean. You can eyeball it to get home, but it's better to be high than low. Except in snow.
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I have found that there are Presta/Schrader adaptors, and then there are Presta/Schrader adaptors. I didn't know this until I picked up a few from a LBS about a year or so ago that didn't adapt Presta to anything I had. These were too long.
I picked up some others from a different LBS that look kind of stubby. Like this:
https://www.performancebike.com/shop/...tegory_ID=5412
Screwed onto the stem, the tip of the valve stem sits flush with the top of the adapter. These have been working well for me.
I picked up some others from a different LBS that look kind of stubby. Like this:
https://www.performancebike.com/shop/...tegory_ID=5412
Screwed onto the stem, the tip of the valve stem sits flush with the top of the adapter. These have been working well for me.
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You will feel when it's wrong. The feel works a lot better than the fingers.
Floor pumps are cheap too
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I use that pump because it has excellent seals, it's made of quality material, and pumps a suprising volume of air for it's size. It's much better than half the floor pumps I run into. Make's patching tubes on the road a breeze.
I couldn't care less that someone stuck a guage on the head.
Tho this thread isn't really about recommending favorite frame pumps... so sorry for the side-track.
Really, don't worry so much about getting the your pressure to match a specific number. Just adjust it till its comfortable. In the middle of a ride I'll sometimes stop and let a random amount of air out because the road's gone gravelly and I want traction, or put more in because its smooth and I want to go faster. Its not an exact science so don't worry about it.
I couldn't care less that someone stuck a guage on the head.
Tho this thread isn't really about recommending favorite frame pumps... so sorry for the side-track.
Really, don't worry so much about getting the your pressure to match a specific number. Just adjust it till its comfortable. In the middle of a ride I'll sometimes stop and let a random amount of air out because the road's gone gravelly and I want traction, or put more in because its smooth and I want to go faster. Its not an exact science so don't worry about it.
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Planet Bike makes a very good and accurate gauge, but it only fits presta. It measures in both atmospheres and psi, and retains the reading until you press a release on the body of the gauge. Regards the way to tell pressure without - I can tell by the sound it makes when I flick my fingernail at the side of the tire if it's over 100psi. But I needed the gauge to learn to tell this in the first place. Hence I have a good floor-pump (Blackburn) at home. Ting! Ting!
#23
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Presta gauges are available and work fine. Gauges on most carry-able pumps are kind of marginal. I can guess fairly close, but still use a separate gauge on tour and the gauge on my floor pump when at home. When fixing flats on day rides I just guess. If I check later I am usually pretty close.
On our Summer long tour, my daughter would notice just a few pounds difference when riding. She always let me know if I was falling down on the job, since in the distribution of chores pumping tires was mine.
On our Summer long tour, my daughter would notice just a few pounds difference when riding. She always let me know if I was falling down on the job, since in the distribution of chores pumping tires was mine.
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You could try sitting on the bike and seeing how much the tires deflect. There should be just a small amount of deflection in both. Obviously a lighter person will need less psi to accomplish what a heavier person would need.
I never understood the one pressure fits all when it comes to bike tires. There is also a difference between front and rear when you apply your weight. I think the max psi suggested by the manufacturer is just that, suggested but not necessary.
Just my $0.02
I never understood the one pressure fits all when it comes to bike tires. There is also a difference between front and rear when you apply your weight. I think the max psi suggested by the manufacturer is just that, suggested but not necessary.
Just my $0.02
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Planet Bike makes a very good and accurate gauge, but it only fits presta. It measures in both atmospheres and psi, and retains the reading until you press a release on the body of the gauge. Regards the way to tell pressure without - I can tell by the sound it makes when I flick my fingernail at the side of the tire if it's over 100psi. But I needed the gauge to learn to tell this in the first place. Hence I have a good floor-pump (Blackburn) at home. Ting! Ting!
+1 "Ting,ting" Is what you want. If it's more of a "thud" you're too low. AFAIK, this only works for road tires. Having said that, there's really no substitute for a decent floor pump with a gauge.
Also, I agree with the poster who said that proper tire pressure depends a lot on the rider. Obviously, lighter people can get away with (and should run, IMO) a lower pressure than a heavier person. The pressure range printed on the tire is really just a guideline. I tend to run 10lbs. lower on the front as well--takes the edge off the bumps.