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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 09-05-06, 08:04 PM   #1
Leisesturm
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Closure (Magnetic)

The hardest and longest step in folding my Giant 1/2way is fiddling with the bungee that secures the bike halves. It has to be unclipped from its clasp and threaded around past the front brake cable and re-clipped to the clasp. Doing that takes far more time than dropping the handlebar and folding the main tube in half. When unfolding I almost never remember to clip the bungee and have to stop and do it before it gets wrapped in the spokes. The cumulative loss of cool points is beginning to worry me. I've never seen the magnetic system that Dahon's use but given that the Halfways wheels touch at the axles and that under those end caps is plenty of space for mounting magnets I think I could fashion some kind of magnetic closure? I was wondering if anyone else had idea's along those lines. Some details of how the Dahon's do it might be useful. Anyone who knows anything about magnets. For instance, do I use two magnets of opposite polarity or one magnet and a steel plate. What strength magnet? What would the best way of securing the magnet in the wheel be: friction tight or epoxy. Just fishing for ideas. Thanks.

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Old 09-05-06, 10:46 PM   #2
megaptera
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I only know Dahon system... but if you want to do it yourself, do it better than theirs. On day 4 of my new Dahon Vitesse D5, the magnetix parts fell off during normal riding, and I lost pieces.

The front piece is screwed securely and it doesn't move. This can still become loose during normal riding. They should've used a clip, spring, or something to push the screw against, so that the vibration wouldn't loosen the screw. The front piece is magnetic metal, but is not a magnet by itself.

The rear piece is loosely mounted or float mounted by a screw with a spring so keep it straight at unfolded position. This gives some flexibility in the exact position of connection with the front piece. The rear piece is a strong magnet. This piece actually fell off during normal riding in my case.

I wrote Dahon to ask them to send me replacement parts, but I didn't hear back so far. Their response doesn't seem to be as fast as their bikes.

Last edited by megaptera; 09-05-06 at 11:00 PM.
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Old 09-06-06, 08:10 PM   #3
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See attached pictures for details, and refer to my previous post for description. These screws and nuts are very prone to loosening due to vibration during normal riding. Luckily it was not hard to find replacement screws at a local hardware store. All these magnetix-related screws and the air-pump hinge screw should be given a drop of medium strength Loctite, in my opinion.
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File Type: jpg P9060749-proof-03-1000.jpg (88.8 KB, 40 views)
File Type: jpg P9060752-proof-04-1000.jpg (84.3 KB, 34 views)
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File Type: jpg P9060745-proof-01-1000.jpg (81.2 KB, 29 views)
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Old 09-12-06, 11:01 AM   #4
Leisesturm
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Hey thanks a lot Megaptera for those pics and explanation! Way beyond the call of duty but your great photo's really have clued me in on the key points. I have a problem with bolts and screws loosening on my bike so the problem isn't unique to the Dahon's. What is frustrating is that they aren't usually a size that fits anything in your road kit.

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Old 09-12-06, 11:17 AM   #5
SkipKnyc
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Quote:
Originally Posted by megaptera
I only know Dahon system... but if you want to do it yourself, do it better than theirs. On day 4 of my new Dahon Vitesse D5, the magnetix parts fell off during normal riding, and I lost pieces.

The front piece is screwed securely and it doesn't move. This can still become loose during normal riding. They should've used a clip, spring, or something to push the screw against, so that the vibration wouldn't loosen the screw. The front piece is magnetic metal, but is not a magnet by itself.

The rear piece is loosely mounted or float mounted by a screw with a spring so keep it straight at unfolded position. This gives some flexibility in the exact position of connection with the front piece. The rear piece is a strong magnet. This piece actually fell off during normal riding in my case.

I wrote Dahon to ask them to send me replacement parts, but I didn't hear back so far. Their response doesn't seem to be as fast as their bikes.
The rear magnetic piece on my Dahon Vitesse D5 came loose, as well. Luckily, however, it stuck to the front piece. I used crazy glue to stick it back into place and it is holding fast ... so far, anyway.

Best regards.
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Old 09-13-06, 12:29 PM   #6
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I recommend Loctite medium strength (242) or product numbers LOC-24221 or LOC-24231, rather than crazy glue to secure screws to make them vibration-resistant.
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