I like valve covers and stem washers!
01-04-12, 12:05 AM
#52
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01-04-12, 07:16 AM
#53
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I don't often us the nut but I like valve caps, I just think they give a nice finished look especially when color coordinated to the dust for the cranks, and skewers
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
01-04-12, 09:56 AM
#54
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We can debate the little nubbies that are found on newly purchased tires.
1)
They significantly add to rotating weight and increase aerodynamic drag and should be removed.
2)
They offer increased traction as the protrude at roughly 45 degrees to the tire, thus help with traction when cornering.
3)
Arguing about nubbies is NOT the same as arguing about stem nuts and caps because tubes come with the nuts and caps, where as the nubbies are just part of the manufactoring process for a tire.
Crap...I just moved this to Trollheim didn't I?
01-05-12, 12:08 PM
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Those little nubs aren't accidents. They are vortex generators designed into the tire.
As you ride down the road, an eddy of air is continually formed around each of those nubs. Those eddies swirl around and, under ideal conditions, produce a small but measurable push against the back of the tire. The size of the eddies is speed ralated and is a function of the length of the nub and the speed of sound. Consequently, at different speeds, tires with differing nub lengths are more advantageous. You may have seen riders changing tires that appear to be fine during various TDF stages. They're actually switching to tires with different nub lengths to provide a more beneficial push.
01-06-12, 03:11 AM
#56
Ha ha ha ha ha
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I keep the value nut on as it stops that annoying mystery noise coming from the skewer that actualy isn't coming from the skewer, but from the metal valve tapping the rim whilst sprinting or climbing mountains. I laugh at those guys that root around outside the coffee shop trying to work out the noise. My metal valves which come with no nut has a small amount of bluetak around them to stop the noise. I say keep them on it you want.
01-06-12, 08:02 AM
#57
Senior Member
The demon tweak.
Those little nubs aren't accidents. They are vortex generators designed into the tire.
As you ride down the road, an eddy of air is continually formed around each of those nubs. Those eddies swirl around and, under ideal conditions, produce a small but measurable push against the back of the tire. The size of the eddies is speed ralated and is a function of the length of the nub and the speed of sound. Consequently, at different speeds, tires with differing nub lengths are more advantageous. You may have seen riders changing tires that appear to be fine during various TDF stages. They're actually switching to tires with different nub lengths to provide a more beneficial push.
Those little nubs aren't accidents. They are vortex generators designed into the tire.
As you ride down the road, an eddy of air is continually formed around each of those nubs. Those eddies swirl around and, under ideal conditions, produce a small but measurable push against the back of the tire. The size of the eddies is speed ralated and is a function of the length of the nub and the speed of sound. Consequently, at different speeds, tires with differing nub lengths are more advantageous. You may have seen riders changing tires that appear to be fine during various TDF stages. They're actually switching to tires with different nub lengths to provide a more beneficial push.
The perpendicular orientation of the nubbies, in relation to the tire/wheel, negatively affects the inherent aerodynamic properties of the tire. A non-asperous tire will roll quicker.
In addition, the rotating weight that is added, due to these nubbies, will reduce the velocity of the rider during a positive elevation gain.
01-06-12, 09:33 AM
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you can't get some from you bike shop? or do you live out in the sticks? OH wait they don't have sticks out there just tumbleweeds
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
01-06-12, 09:53 AM
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I offered him a few for just the postage. I think that since you drive all over the country, he's waiting for you to drop off a few as you're passing through.
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
01-06-12, 10:02 AM
#60
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The demon tweak.
Those little nubs aren't accidents. They are vortex generators designed into the tire.
As you ride down the road, an eddy of air is continually formed around each of those nubs. Those eddies swirl around and, under ideal conditions, produce a small but measurable push against the back of the tire. The size of the eddies is speed ralated and is a function of the length of the nub and the speed of sound. Consequently, at different speeds, tires with differing nub lengths are more advantageous. You may have seen riders changing tires that appear to be fine during various TDF stages. They're actually switching to tires with different nub lengths to provide a more beneficial push.
Those little nubs aren't accidents. They are vortex generators designed into the tire.
As you ride down the road, an eddy of air is continually formed around each of those nubs. Those eddies swirl around and, under ideal conditions, produce a small but measurable push against the back of the tire. The size of the eddies is speed ralated and is a function of the length of the nub and the speed of sound. Consequently, at different speeds, tires with differing nub lengths are more advantageous. You may have seen riders changing tires that appear to be fine during various TDF stages. They're actually switching to tires with different nub lengths to provide a more beneficial push.
01-06-12, 10:40 AM
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The vortex generators shown in the image are those of a 1956 Douglas A4D-1 Skyhawk at the New England Air Museum. https://images.search.yahoo.com/image...mb=FhK75AiEd2q
which many of us Airdales know and love as the venerable A-4D,E,F,M
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
Last edited by Bianchigirll; 01-06-12 at 10:43 AM.
01-06-12, 11:06 AM
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42nd
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
01-06-12, 11:11 AM
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PS, I also think it would be nice if tubes came with two stems and valves, so you could still air it up if one got clogged up, and to keep the wheel balanced.
01-06-12, 11:47 AM
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I disagree.
The perpendicular orientation of the nubbies, in relation to the tire/wheel, negatively affects the inherent aerodynamic properties of the tire. A non-asperous tire will roll quicker.
In addition, the rotating weight that is added, due to these nubbies, will reduce the velocity of the rider during a positive elevation gain.
The perpendicular orientation of the nubbies, in relation to the tire/wheel, negatively affects the inherent aerodynamic properties of the tire. A non-asperous tire will roll quicker.
In addition, the rotating weight that is added, due to these nubbies, will reduce the velocity of the rider during a positive elevation gain.
01-06-12, 12:32 PM
#65
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i use neither. i can see using the stem washers for push on pumps, but my pump head threads on.
01-06-12, 01:33 PM
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The demon tweak.
Those little nubs aren't accidents. They are vortex generators designed into the tire.
As you ride down the road, an eddy of air is continually formed around each of those nubs. Those eddies swirl around and, under ideal conditions, produce a small but measurable push against the back of the tire. The size of the eddies is speed ralated and is a function of the length of the nub and the speed of sound. Consequently, at different speeds, tires with differing nub lengths are more advantageous. You may have seen riders changing tires that appear to be fine during various TDF stages. They're actually switching to tires with different nub lengths to provide a more beneficial push.
Those little nubs aren't accidents. They are vortex generators designed into the tire.
As you ride down the road, an eddy of air is continually formed around each of those nubs. Those eddies swirl around and, under ideal conditions, produce a small but measurable push against the back of the tire. The size of the eddies is speed ralated and is a function of the length of the nub and the speed of sound. Consequently, at different speeds, tires with differing nub lengths are more advantageous. You may have seen riders changing tires that appear to be fine during various TDF stages. They're actually switching to tires with different nub lengths to provide a more beneficial push.
01-07-12, 03:18 PM
#69
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