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Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

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Old 09-07-17, 06:06 AM   #151
kayakindude
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Quote:
Originally Posted by badmother View Post
Ok, thank you for explaining. Could threadlock (or sprung washers) be used to hold screws in place or is there so much room you really need the tape? Just being curious.

The three holes: I think Dahon started off with two holes and then for some reason decided to change the standard to three- and then went back to the old standard.

I bought some Clickfix stuff some years ago for my two hole Dahon curve and it came with an adaptor to atatch it to a three hole bike (if needed).

Best solution instead of adaptors would be if a proper Brompton block to fit on a Dahon and Proper Klickfix block to fit on a Brompton was available.

I would really like to know if my reshaped B block on my Curve is a better (stronger, stiffer) solution than this adapter.
Went with the tape because it was what I had lying around. Nuts would always be best but the holes have bottoms so I ruled that out.

I imagine your block has less lateral stress, but only time will tell if the weight will make a difference. 12 miles yesterday without issue, but still early.

Confident enough now to spend the bucks on my own bag...way better than my backpack.
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Old 09-07-17, 08:17 AM   #152
L Arnold
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Very interesting post and set of design input. After all this I am inclined to say that I like the idea of a front rack and bridging the headpost to a second attachment at the lower end of the handlebar.

I want to do some comparative testing. Lets see if there is time.

The first issue are cable routings, of course. Second issue is foldability. Third is quick release but all can be handled. Bike control testing will also be important to compare.

Super impressed with all the work folks have put in on this.
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Old 09-07-17, 09:25 AM   #153
kayakindude
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The cables have to be pushed behind the bag, but I am going to experiment with a fastening system to hold them closer to the front stem, yet still allow for the handlebar folding.

Handling is different, best described as more solid and not as nimble. I do not see that as a negative. It does not seem practical to leave the bag on while folded, at least not when loaded, but the quick release works great and I just keep the bag with me on the train (including snacks and coffee).

Hope that helps.
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Old 09-11-17, 06:28 PM   #154
L Arnold
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This was this morning's rackification on my Visc D18. Started with the front. Then added the back.

I have no idea why the back rack shows a 18kg weight rating when it is twice as beefy as other Dahon racks. I did use hd Steel bolts rather than Stainless ones and guessing a 6mm upgrade from 5mm would help.

The bike also tows a Burley Travois trailer. Next is to fit it all in a suitcase but it may take two with this rack. The smaller racks and bike sill fit in one suitcase.

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Old 09-12-17, 08:43 AM   #155
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Quote:
Originally Posted by kayakindude View Post
My adapter arrived today. Looks awesome in black and fit on my Vybe perfectly. Time to order the Brompton block.

Thanks again!
Glad you enjoy it!

Quote:
Originally Posted by badmother View Post
Follow this link: https://www.shapeways.com/product/QL...ionId=61648886

The info you need is at the bottom left of the page.

Anybody know is Titanium bolts can take the same weight as steel for this kind of use?
Thanks badmother for the link. Not sure of the rules of this place.

As for the stainless vs titanium, stainless has a higher tensile strength than titanium so I'd stick with stainless. Unless you're deadset on ti

Quote:
Originally Posted by kayakindude View Post
So I picked up the screws and bolts on the list and settled in for a nice rainy day project.

It was all good until adding the second screw to the Vybe frame. So great news that the Vybe has the three hole pattern. The bad news is the third hole has no thread!

So I can only use one screw for the adapter at the moment as holes one and two are too close to each other.

Any suggestions on how to overcome this?
Wait I'm confused. So the adapter fits your bike? I designed the adapter for the two-hole bolt pattern (for now, I'm thinking of doing a three-bolt as they're way more popular than I thought), so I don't see how yours fits if it's a three-bolt pattern. Could you post another pic? Thanks for the clarifying, just trying to make sure people get what they're expecting.

Quote:
Originally Posted by L Arnold View Post
This was this morning's rackification on my Visc D18. Started with the front. Then added the back.

I have no idea why the back rack shows a 18kg weight rating when it is twice as beefy as other Dahon racks. I did use hd Steel bolts rather than Stainless ones and guessing a 6mm upgrade from 5mm would help.

The bike also tows a Burley Travois trailer. Next is to fit it all in a suitcase but it may take two with this rack. The smaller racks and bike sill fit in one suitcase.

Am I the only one that doesn't see any pictures?
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Old 09-12-17, 11:34 AM   #156
kayakindude
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Wait I'm confused. So the adapter fits your bike? I designed the adapter for the two-hole bolt pattern (for now, I'm thinking of doing a three-bolt as they're way more popular than I thought), so I don't see how yours fits if it's a three-bolt pattern.
The middle hole on the Vybe came with a screw to hold a cover plate on it. Your 2 hole adapter works as designed for the Dahon 2 hole pattern, which are my outlying holes. My issue began when the bottom outlying hole was missing thread. I resolved by buying a tap and thread set and threading the hole.

The screw thread is not perfectly square (I would say about 90%), so one part of the screw top is not snug into the base.

So far everything is working great. I have taken it through 4 rides and it remains snug- though the plumbers tape made a difference. Yesterday I went over several cobble stone streets, pot holes, and crappy roads- no issues.

If that bottom screw causes any issues my plan is to fill in the slight gap between the screw top and adapter with liquid nails. The photo shows the gap on one side, the other side is flush.
Attached Images
File Type: jpg Picture1.jpg (42.7 KB, 28 views)

Last edited by kayakindude; 09-12-17 at 11:47 AM.
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Old 09-12-17, 12:29 PM   #157
L Arnold
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Dropbox - not sure it is showing:

Quote:
Originally Posted by slickginger View Post


Am I the only one that doesn't see any pictures?
I'm new to the forum and trying to use Dropbox links for the images as I can't drop a full picture in otherwise.

I saw the picture I posted yesterday in your post but seems you did not so.. who's to say. This one is a Link this time.

https://www.dropbox.com/s/d62srxnk48...18.20.jpg?dl=0
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Old 09-14-17, 11:18 AM   #158
slickginger
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Quote:
Originally Posted by kayakindude View Post
The middle hole on the Vybe came with a screw to hold a cover plate on it. Your 2 hole adapter works as designed for the Dahon 2 hole pattern, which are my outlying holes. My issue began when the bottom outlying hole was missing thread. I resolved by buying a tap and thread set and threading the hole.

The screw thread is not perfectly square (I would say about 90%), so one part of the screw top is not snug into the base.

So far everything is working great. I have taken it through 4 rides and it remains snug- though the plumbers tape made a difference. Yesterday I went over several cobble stone streets, pot holes, and crappy roads- no issues.

If that bottom screw causes any issues my plan is to fill in the slight gap between the screw top and adapter with liquid nails. The photo shows the gap on one side, the other side is flush.
Oh boy. Interesting, thanks for the picture and clarification. Makes sense now, sounds like they just got lazy with the manufacturing.

Although not ideal, I'd say maybe the best thing to do in your situation (now that you've tapped as far as it will go, hopefully with a "bottoming" tap to get useful thread all the way to the bottom) is to either buy a shorter screw, or cut off length from the screw you've got. You're not getting any more thread engagement by having the screw head stick out like that, and plumber's tape (while a good short-term solution!) isn't going to hold up for years. You really want the countersink of the screw to make good contact with the adapter for full strength and stability. If you can get the screw a couple mm shorter, I'd give that a whirl! Hope that helps, glad you're enjoying it despite the issue

Quote:
Originally Posted by L Arnold View Post
I'm new to the forum and trying to use Dropbox links for the images as I can't drop a full picture in otherwise.

I saw the picture I posted yesterday in your post but seems you did not so.. who's to say. This one is a Link this time.

https://www.dropbox.com/s/d62srxnk48...18.20.jpg?dl=0
I think it must be my work network... my company doesn't allow dropbox. No worries I'll just check it later!
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Old 09-14-17, 12:26 PM   #159
L Arnold
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I think it must be my work network... my company doesn't allow dropbox. No worries I'll just check it later!
Picture and racks attached now.
In the solo picture have the handlebar twisted as I had just folded it to see how it fits on the Burley Travois trailer (does fit). Second pic added now so you can see the trailer, rack clearance and the nice Kenda K-Rad tires I like on this bike. They just barely clear the fenders at 1.95". Without fenders I can run 2.25" K-rad or Holy Roller which I do for sure on Jetstreams.

The rear Dahon "Ultimate" rack is nice in that it has a slide in pouch that is more convenient to access than on the Dahon "Traveller" rack, both of which are high enough at the rack to easily take side panniers. It is a little "heavy" but it is also strong so if you really want to carry a load it is nice. The "Stash Bag" space would also accommodate a full on battery if one is to electrify the bike (not this one but I've done a Mu D8).

The front rack is a standard front rack. Not really high capacity and it would do well to have some sidewalls for panniers that might fit. Still, I am partial to the front load being attached and respondent to the wheel and handlebar twist rather than being fixed to the fork. It would be interesting to have a standoff from the handlebar post as well so that some real goods could be attached and semidetached easily and without worry about the cable and tube runs.

I have removed the cable runs from the frame as I can remove the handlebar, keeping the chain-line cables and cable sets sets intact while actually fit this bike onto my standard size suitcase (Samsonite). I can do this with all Visc, Mariner and Vitesse frames so pretty flexible.

The big rear rack will challenge the Suitcase so likely coming off of this bike and going on another. I do have these and other Dahon racks available and in stock if folks are interested.

Last edited by L Arnold; 09-14-17 at 12:55 PM.
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