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This is all very confusing but let me know if I have this correct.
Rolling resistance (RR) is determined primarily by tire deflection.
Wide tires deflect less than skinny tires, so a wide tire with a high
thread count is the best solution for RR. But wheel weight and
aerodynamics are more important to overall speed than RR. So when you
lighten up the wheel and go to narrower tire for less weight and
better aerodynamics you need to increase tire pressure to eliminate
deflection, but at a certain point over inflation will gain you
little advantage.
Steve Brown
On Feb 28, 2008, at 12:29 PM, Tony McCray wrote:
> I did a lot of research last year before buying a new set of
> wheels, and most of what I read suggested that a quality modern
> clincher is just as good as a tubular. Also, inflating your
> tubulars to a billion psi isn't necessary http://www.zipp.com/
> Portals/0/Shopping/Images/tire_pressures.jpg
>
> -Tony
>
> 2008/2/28 tackyglueit :
> i could have it backwards but im pretty sure that's what ive read
> over there. you should check it out, some of the conversations
> they have over there are pretty lettered.
>
>
>
> On Thu, Feb 28, 2008 at 12:12 PM, Jerald M Powell
> wrote:
> I have two questions for Mr "glueit"... First, (unless there's been
> some kind of celestial shift), don't you have that backwards? and
> Second, have you seen a rush by trackies to get wired-on track
> tires (if there is there such a thing)?
>
> And one observation... The choice might depend on what the rims are
> that you have. On the road, the differences seem to be kind of
> academic. Cost for a similarly "durable" (OK, a twenty or thirty
> dollar tire/tube) or race-able tire (say, a tire combination that
> costs a bit over twice that) is similar, "tire life" is similar,
> and the trade off seems to be that the tub is harder to repair (and
> frequently is just discarded) but frankly, less often in need of
> repair.
>
> Jerry
>
> On Feb 28, 2008, at 11:46 AM, tackyglueit wrote:
>
>> all the guys over on the wattage site say clinchers are the way to
>> go. too much rolling resistance with a tubular.
>>
>> 2008/2/28 Rick Johnson :
>> Yea, even BikePortland is up to 104 comments on the helmet law.
>>
>> But, I'm interest in hearing more about tubulars - are they really
>> worth the money and hassle? So far I've not heard enough to
>> convince me.
>>
>> Rick
>>
>> Bryan Curry wrote:
>>>
>>> No. I've seen 900+ messages on helmet usage within a single
>>> thread at Google groups. OBRA members are slackin'.
>>> -----Original Message-----
>>> From: obra-bounces@list.obra.org [mailto:obra-
>>> bounces@list.obra.org] On Behalf Of Mike Murray
>>> Sent: Thursday, February 28, 2008 11:11 AM
>>> To: 'OBRA List'
>>> Subject: [OBRA Chat] Tubulars vs. clinchers
>>>
>>> We might be able to get as many postings with this subject. What
>>> do you think?
>>>
>>>
>>> Mike Murray
>>>
>>> -----Original Message-----
>>> From: obra-bounces@list.obra.org [mailto:obra-
>>> bounces@list.obra.org] On Behalf Of C M
>>> Sent: Thursday, February 28, 2008 08:08 AM
>>> To: jon.ragsdale@comcast.net; OBRA List
>>> Subject: Re: [OBRA Chat] Helmets will be mandatory in Vancouver, WA
>>>
>>> Jon....good job with the original posting, as of this morning I
>>> count 71 entries related to this topic, this may have set a record.
>>>
>>> On 2/26/08, jon.ragsdale@comcast.net
>>> wrote:
>>> There is a story on the front page of www.kgw.com reporting that
>>> Vancouver has enacted a rule that in 30 days all cyclists will be
>>> required to wear helmets. Full story: http://www.kgw.com/news-
>>> local/stories/kgw_022608_news_vancouver_helmet_law_bicycle.
>>> 2edad9de.html
>>>
>>> _______________________________________________
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>>>
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>>>
>>
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>
>
>
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