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#11
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threaded fork sizing?
Eric Hill wrote:
Yeah. To be sure, and I don't think I mentioned this in my original post, my idea here is to shave some weight until I buy a new bike in a year or so. Now, to track down that Bianchi threaded carbon fork they made a few years back! The difference in weight between an older-style threaded carbon fork and a Bianchi steel unicrown fork is maybe 3 or 4 oz. Not worth the trouble and expense if you are planning to get a new bike next year anyway, IMO. |
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#12
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threaded fork sizing?
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#13
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threaded fork sizing?
Zog The Undeniable wrote:
Unless you love the look of a quill stem, go threadless. You'll need a new stem and headset, but this seems like the ideal opportunity to upgrade. Decent quill stems are getting rare - especially if you want a black one - and one day you'll need to replace yours. Eric Hill wrote: I've actually read and thought about this a bit and am not convinced that it's actually qualifies as an upgrade. I'm with Eric. And there's no shortage of black quills. If anything there's more selection now, especially at both small and large extremes. -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 |
#14
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threaded fork sizing?
A Muzi wrote:
Zog The Undeniable wrote: Unless you love the look of a quill stem, go threadless. You'll need a new stem and headset, but this seems like the ideal opportunity to upgrade. Decent quill stems are getting rare - especially if you want a black one - and one day you'll need to replace yours. Eric Hill wrote: I've actually read and thought about this a bit and am not convinced that it's actually qualifies as an upgrade. I'm with Eric. And there's no shortage of black quills. If anything there's more selection now, especially at both small and large extremes. And to wrap this subthread up, that picture is just the picture of my stem from the Bianchi site. I don't care about stem color. -eric |
#15
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threaded fork sizing?
Eric Hill wrote:
I've actually read and thought about this a bit and am not convinced that it's actually qualifies as an upgrade. On 16 Jul 2005 16:28:49 -0700, " wrote: All things considered, the same could be said about replacing a good steel fork with the latest-and-greatest carbon model. John Forrest Tomlinson wrote: Why? Carbon forks are strong and lighter. Eric Hill wrote: Yeah. To be sure, and I don't think I mentioned this in my original post, my idea here is to shave some weight until I buy a new bike in a year or so. Now, to track down that Bianchi threaded carbon fork they made a few years back! Threaded carbon forks are a standard and popular item. No need to buy vintage. Newer forks are arguably better. And cost less. -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 |
#16
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threaded fork sizing?
Dave Thompson wrote:
wrote: snip I doubt if Shimano ever made a threaded 1.125" headset. They didn't. The 105 headset is 1". They certainly made a 1.25" threaded XT headset. I have one on my Cannondale, a NOS one in the garage and a set of spare cartridges! |
#17
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threaded fork sizing?
On Sat, 16 Jul 2005 06:10:51 GMT, Eric Hill
wrote: Dave Thompson wrote: wrote: snip I doubt if Shimano ever made a threaded 1.125" headset. They didn't. The 105 headset is 1". Perfect, guys. Thanks. HP-M901 HP-M741 HP-M736 HP-M651 HP-M564 are all Shimano models for threaded 1.125" steerers. Maybe others. ------------------------------- John Dacey Business Cycles, Miami, Florida Since 1983 Comprehensive catalogue of track equipment: online since 1996. http://www.businesscycles.com |
#18
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threaded fork sizing?
On Sun, 17 Jul 2005 21:31:01 -0500, A Muzi wrote:
Eric Hill wrote: I've actually read and thought about this a bit and am not convinced that it's actually qualifies as an upgrade. I'm with Eric. And there's no shortage of black quills. If anything there's more selection now, especially at both small and large extremes. Yeah, me too. The main advantage of threadless, besides giving bikeshops something to do in selling them for older bikes and the immense market in replacement stems, seems to be that you don't get aluminum quills oxidising solid in the steerer tube any more. Now, if I had my druthers, I'd call that a materials science defect rather than a structural defect. Never seen an oldfashioned chromed-steel stem be more than a little rusted shut. And it's not like threadless is any cheaper, the headsets are more complicated, the steerer tube has to be longer (and selling one that has been cut down second hand ought to be a crime), and even the stems are twice as complex (even compared to quill stems with 4-bolt, easy-change bar attachment side). And lower end bikes need even more complicated stems with a pivot to have even the slightest adjustability, which is something people count on getting on those. As far as I'm concerned, threadless should be the domain of weight weenies. Jasper |
#19
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threaded fork sizing?
Jasper Janssen writes:
I've actually read and thought about this a bit and am not convinced that it's actually qualifies as an upgrade. I'm with Eric. And there's no shortage of black quills. If anything there's more selection now, especially at both small and large extremes. Yeah, me too. The main advantage of threadless, besides giving bike shops something to do in selling them for older bikes and the immense market in replacement stems, seems to be that you don't get aluminum quills oxidizing solid in the steerer tube any more. Now, if I had my druthers, I'd call that a materials science defect rather than a structural defect. Never seen an old fashioned chromed-steel stem be more than a little rusted shut. I think you must have missed the years after the introduction of the aluminum quill stem when steel stems practically vanished. Head bearing manufacturers tried O-rings in the top nut and goop in the top of the steer tube to prevent the common permanent corrosion of stem to fork. Only then did the failure mode become apparent in which the quill stem is attached only at its lower end by an expander while the upper end remained free to move radially, both elastically and by fretting in the expanded split end. At this time, some stems reverted to the slant cut wedge that had been used on department store bicycle, because it had a longer clamp zone. The result was that these stems are rotationally insecure and with forceful riding unscrewed the stem expander bolt. All this came to a head when MTB bars with their larger width and often greater offset overloaded the quill stem to the point that it broke off on occasion besides experiencing the corrosion failure more readily. The corrosion failure occurs primarily because the stem pumps from side to side and in wet weather introduces water laced with sweat into the interface. The pumping motion was not readily evident because it was partly elastic compliance and not made up entirely of a loose fit in the steer tube. And it's not like threadless is any cheaper, the headsets are more complicated, the steerer tube has to be longer (and selling one that has been cut down second hand ought to be a crime), and even the stems are twice as complex (even compared to quill stems with 4-bolt, easy-change bar attachment side). And lower end bikes need even more complicated stems with a pivot to have even the slightest adjustability, which is something people count on getting on those. As with tubular tires, we will see defenders of the ill conceived quill stem for many years. As far as I'm concerned, threadless should be the domain of weight weenies. I suppose if you don't want to recognize mechanical realities, you can remain in that belief without doubt. You might consider some of the tradeoffs: http://www.sheldonbrown.com/brandt/t...s-headset.html Jobst Brandt |
#20
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threaded fork sizing?
On 2005-07-29 13:52:50 -0700, Jasper Janssen said:
On Sun, 17 Jul 2005 21:31:01 -0500, A Muzi wrote: Eric Hill wrote: I've actually read and thought about this a bit and am not convinced that it's actually qualifies as an upgrade. I'm with Eric. And there's no shortage of black quills. If anything there's more selection now, especially at both small and large extremes. Yeah, me too. The main advantage of threadless, besides giving bikeshops something to do in selling them for older bikes and the immense market in replacement stems, seems to be that you don't get aluminum quills oxidising solid in the steerer tube any more. Now, if I had my druthers, I'd call that a materials science defect rather than a structural defect. Never seen an oldfashioned chromed-steel stem be more than a little rusted shut. Well, other than threadless can be lighter, stronger, and stiffer. Oh and not get stuck. And it's not like threadless is any cheaper, the headsets are more complicated, the steerer tube has to be longer (and selling one that has been cut down second hand ought to be a crime), and even the stems are twice as complex (even compared to quill stems with 4-bolt, easy-change bar attachment side). And lower end bikes need even more complicated stems with a pivot to have even the slightest adjustability, which is something people count on getting on those. My Chris King headset is a lot LESS complicated. What's complicated? Besides, I always had problems with threaded headsets coming loose. Not so with threadless. The stems are also very simple... my stem has 2 pinch bolts -- one for the steerer tube, one for the handlebars. As far as I'm concerned, threadless should be the domain of weight weenies. I always had something annoying me about my quill stem. Haven't had the same with threadless. I really find it to be a better product, and the weight savings are just icing on the cake. |
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