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#1
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re ahead headset bearings
Hi
I am intrigued now, the headset really doesn't have bearings. The headtube is slightly conical at both ends and a circular split bush compresses into the headtube when the central allen screw is tightened. I have googled for it but cant find any info or images. The bike is a trek 7200 hybrid. thanks Gary -- Visit my websites at www.justjents.co.uk www.recumbent.50megs.com |
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#2
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re ahead headset bearings
geepeetee wrote:
Hi I am intrigued now, the headset really doesn't have bearings. I don't believe that. Have you removed the stem and forks yet to look inside? The headtube is slightly conical at both ends and a circular split bush compresses into the headtube when the central allen screw is tightened. I have googled for it but cant find any info or images. The bike is a trek 7200 hybrid. Integrated headset? http://www.parktool.com/repair/readhowto.asp?id=68 Do you really mean head tube or steer tube? Does it have anything like this: http://www.chainreactioncycles.com/M...x?ModelID=2741 ? ~PB |
#3
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re ahead headset bearings
On 16/09/2006 18:18, geepeetee said,
I am intrigued now, the headset really doesn't have bearings. The headtube is slightly conical at both ends and a circular split bush compresses into the headtube when the central allen screw is tightened. I have googled for it but cant find any info or images. *ALL* headsets use bearings, AFAIK. Are you able to take photos yourself of what you have, and post them somewhere? -- Paul Boyd http://www.paul-boyd.co.uk/ |
#4
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re ahead headset bearings
Actually, from the description it sounds more like it has this sort of
thing: http://www.chainreactioncycles.com/M...x?ModelID=2218 - Used for pressing the the stem down, which in turn loads the headset beaings. Apologies if I'm egg-suck teaching. ~PB |
#5
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re ahead headset bearings
In article
Paul Boyd wrote: On 16/09/2006 18:18, geepeetee said, I am intrigued now, the headset really doesn't have bearings. The headtube is slightly conical at both ends and a circular split bush compresses into the headtube when the central allen screw is tightened. I have googled for it but cant find any info or images. *ALL* headsets use bearings, AFAIK. Are you able to take photos yourself of what you have, and post them somewhere? Some small-wheelers have a ball race at the bottom and a nylon bush at the top. |
#6
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re ahead headset bearings
geepeetee wrote: Hi I am intrigued now, the headset really doesn't have bearings. The headtube is slightly conical at both ends and a circular split bush compresses into the headtube when the central allen screw is tightened. I have googled for it but cant find any info or images. The bike is a trek 7200 hybrid. thanks Gary -- Visit my websites at www.justjents.co.uk www.recumbent.50megs.com Try harder :{ http://www.trekbike.co.uk/2007/bikes...ID= 16&ID=255 says:HEADSET: VP semi-cartridge |
#7
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re ahead headset bearings
"Pete Biggs" a écrit:
Actually, from the description it sounds more like it has this sort of thing: http://www.chainreactioncycles.com/M...x?ModelID=2218 - Used for pressing the the stem down, which in turn loads the headset beaings. Apologies if I'm egg-suck teaching. I think you're probably misreading between the lines. "The headtube is slightly conical at both ends and a circular split bush compresses into the headtube when the central allen screw is tightened." Many threadless headsets one or more split conical compression rings to provide radial preload when the top bolt is tightened. In a cartridge bearing headset, the lower ring often replaces the crown race. The Trek site says "VP semi cartridge": http://www.trekbike.co.uk/2007/bikes...ID= 16&ID=255 and shows a headset with external cups and a tall conical spacer: http://www.trekbike.co.uk/2006/bike_images/07_7200.jpg http://www.bicyclestore.com.au/files...ges/d_2338.jpg The VP site shows a similar looking headset, the Slimstak: http://www.vpcomponents.com/images/ProdAD2.jpg http://www.vpcomponents.com/headset_show.asp?pid=40 It's called semi-integrated beacause the cups sit flush with the head tube, but it's basically a conventional Aheadset. James Thomson |
#8
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re ahead headset bearings
Paul Boyd wrote:
*ALL* headsets use bearings, AFAIK. "Rob Morley" a écrit: Some small-wheelers have a ball race at the bottom and a nylon bush at the top. Raleigh Twenties being a common example. Of course it's still a bearing, just not a ball bearing. There was a plastic headset in the early eighties that used, IIRC, Delrin cups and PTFE bushes top and bottom. I don't recall the brand, but they didn't stay long on the market. James Thomson |
#9
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re ahead headset bearings
In article
James Thomson wrote: Paul Boyd wrote: *ALL* headsets use bearings, AFAIK. "Rob Morley" a écrit: Some small-wheelers have a ball race at the bottom and a nylon bush at the top. Raleigh Twenties being a common example. Of course it's still a bearing, just not a ball bearing. Indeed - but when most people say 'bearings' they mean 'balls' :-) |
#10
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re ahead headset bearings
James Thomson wrote:
I think you're probably misreading between the lines. You must be right. Sorry Gary. Please ignore my replies on the subject. ~PB |
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