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#11
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"Strange" object attached to downtube
Alex Rodriguez wrote:
I want some. How much for a three tires worth? If you are willing to accept the "heated" version, by just doing a quick search in this group or rec.bicycles.racing for "helmet" you will find large quantities which can be downloaded for free. DR |
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#13
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"Strange" object attached to downtube
F
"V-Mook" wrote in message oups.com... What is that cylindrical object attached to the downtube of Bobet's bike? For a brief time, Schwinn Varsity models such as the one pictured came with an optional pipe-bomb cage. |
#14
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"Strange" object attached to downtube
On 9 Aug 2005 06:50:37 -0700, "Dirtroadie"
wrote: wrote: N2 has the slight advantage of being much less soluble than CO2 in rubber, so it wouldn't lose pressure as fast as tubes filled with CO2, but unlike CO2 it wasn't a liquid at the usable pressure and temperature, so the cylinders were much larger. Although 100% nitrogen may have its advantages, I have had great success with a carefully tailored mixture of 78% nitrogen for filling tires. Use of this compound has resulted in the lowest rolling resistance that I have been able to perceive. I have noticed that sometimes merely topping up a tire with the mixture will lower its apparent rolling resistance dramatically. I began using this mixture quite some time ago when I seredipitously stumbled upon an inexpensive source which I believe will serve my needs for at least the next ten years and probably longer. I must confess that I have been so pleased with the effectiveness of the 78% nitrogen mixture that I have not attempted to determine whether some other percentage such as 75% or 80% might be better, but I suspect that, in any case, 78% is the sweet spot of the performance/cost curve. DR Dear DR, http://groups-beta.google.com/group/...e=source&hl=en Carl Fogel |
#15
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"Strange" object attached to downtube
On Tue, 9 Aug 2005 21:08:37 -0500, "Bob the Cow" wrote:
F "V-Mook" wrote in message roups.com... What is that cylindrical object attached to the downtube of Bobet's bike? For a brief time, Schwinn Varsity models such as the one pictured came with an optional pipe-bomb cage. Yes, but that was only for the Irish models. Paul |
#16
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"Strange" object attached to downtube
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#18
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"Strange" object attached to downtube
On 10 Aug 2005 18:07:05 -0700, "Dirtroadie"
wrote: wrote: On 9 Aug 2005 06:50:37 -0700, "Dirtroadie" Dear DR, http://groups-beta.google.com/group/...e=source&hl=en ummm..., err..., uhhhhh... OK, maybe you missed my point. Never mind. DR Dear DR, Maybe you missed mine. Google a bit for why nitrogen is used in tires and you'll soon come up with differences between 80% N2 and what they were using. Airily, Carl Fogel |
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