B
Bob M
Guest
On Fri, 22 Aug 2003 13:18:00 GMT, Al Frost <[email protected]> wrote:
> [email protected] wrote in news:Rv81b.13860$dk4.490375 @typhoon.sonic.net:
>
>> That depends on whether the old system is a burden on maintenance and safety. I'm going to change
>> because I have had enough problems with quill stems to warrant it. Besides, the safety margin in
>> a 0.975 dia aluminum stem is nowhere near that of a 1.25 dia tubular stem.
>>
>> Jobst Brandt [email protected] Palo Alto CA
>>
> Now there's logic for you! Assuming that your 1.25" steerer and your .975" quill were not hollow
> and there were made of similar materials then your conclusion of a higher safety margin would be
> sound. But they are not. The wall thickness of a steerer is much less than that of a quill. Even
> though the outside diameter of the steerer is much larger the quill retains it's strength with
> increased wall thickness. Besides if you are breaking your quills then you need to take up a
> different activity.
>
> AL
>
Personally, I cannot tell any strength difference between my quill stem on my old Trek and the
threadless system on my new LeMond.
--
Bob M in CT Remove 'x.' to reply
> [email protected] wrote in news:Rv81b.13860$dk4.490375 @typhoon.sonic.net:
>
>> That depends on whether the old system is a burden on maintenance and safety. I'm going to change
>> because I have had enough problems with quill stems to warrant it. Besides, the safety margin in
>> a 0.975 dia aluminum stem is nowhere near that of a 1.25 dia tubular stem.
>>
>> Jobst Brandt [email protected] Palo Alto CA
>>
> Now there's logic for you! Assuming that your 1.25" steerer and your .975" quill were not hollow
> and there were made of similar materials then your conclusion of a higher safety margin would be
> sound. But they are not. The wall thickness of a steerer is much less than that of a quill. Even
> though the outside diameter of the steerer is much larger the quill retains it's strength with
> increased wall thickness. Besides if you are breaking your quills then you need to take up a
> different activity.
>
> AL
>
Personally, I cannot tell any strength difference between my quill stem on my old Trek and the
threadless system on my new LeMond.
--
Bob M in CT Remove 'x.' to reply