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Old 09-04-17, 06:17 AM   #1
kayakindude
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Headset clearance

My Dahon Vybe has the standard front mounting holes (3 hole pattern ), but only the upper and middle are threaded.

My question is if I pull the front headset apart, is there enough clearance inside the tube to slide a nut in so I have something to screw into?
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Old 09-04-17, 02:53 PM   #2
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I picked up a tap and thread set, 5m thread, and am going to attempt to create threads in the pre-existing hole.

This is my first "ding" concerning this Dahon product because there is no excuse to only thread two out of three holes.

This seems to be a better option than ripping the headset apart.
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Old 09-04-17, 04:47 PM   #3
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Perhaps the hole was missed and not tapped in the factory?
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Old 09-04-17, 06:28 PM   #4
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Originally Posted by MultiplexMan View Post
Perhaps the hole was missed and not tapped in the factory?
That's all I can think of. I threaded the hole with mixed results. The screw would not go in without a lot of force, it's almost all the way in and is at a slight angle, but holding tight. Not perfect but it's the bottom screw below the Brompton block, so hopefully it suffers less stress than the top hole.
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Old 09-04-17, 07:44 PM   #5
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Clearly that was a mistake at the factory.

Thanks
Yan
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Old 09-04-17, 08:56 PM   #6
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Quote:
Originally Posted by kayakindude View Post
My Dahon Vybe has the standard front mounting holes (3 hole pattern ), but only the upper and middle are threaded.
Do you have the accessory that is meant to attach to the head tube? Sometimes there is a peg for location or additional support; this wouldn't need a threaded hole.
And... why would three threaded holes be needed anyway? That would seem to be a strange design, as two bolts would provide attachment and resistance to rotation.
I couldn't find any images of the attachment mechanism on the Dahon site, so I could be wrong.
Steve
EDIT: If the unthreaded hole is on one end, it might be for a peg so the attachment can only be installed one way. Just thinkin' out loud...
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Old 09-05-17, 07:49 AM   #7
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The middle hole was just holding the cover in. The 2 holes used to attached accessories are holes 1 and 3. The adapter fit perfectly over them. I added the Brompton block and a buddy loaned me a bag to test. It has a little bit of side to side wiggle but that could be the fit with the adapter. Will add some weight and see how it holds up on the way back from work. It is odd at best that Dahon would provide the holes needed to add attachments and only thread one of them.
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Old 09-05-17, 12:50 PM   #8
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they are not really designed for the Brompton stuff ... hence the middle hole doesn't do anything. Having said that the bikes I inspected had threads in all 3 holes
thor
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