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Old 02-09-13, 11:34 PM   #1
coolio
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Hose clamp on bottom of seatpost tube to prevent saddle theft?

Hey all,
Has anyone attached something to the bottom of the seatpost tube to prevent someone from running off with the seapost and the saddle? I thought of a hose clamp, but didn't know if there were better ideas. Also, don't wanna damage the seatpost itself.

I like to fold my bike and take it inside but occasionally leave it outside locked up. A QR clamp is a tempting target for saddle thieves.
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Old 02-10-13, 04:09 AM   #2
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Not sure. If the thief can watch your bike for some time to make a plan it is only one or two extra seconds. You could disguise the hoseclamp with several layers cut from an old innertube or similar to delay the process, but I would suspect if you are out to steel bikes or bikeparts bike you would carry tools.

On a regular bike peopel have described removing one screw from a hole in the frame (like for atatching a bottle cage) and threading a brakewire trough the hole. The "lump" at the end can not enter trough the hole. Then thread the wire up trough the seatpost and trough the (hopefully) hole in the top of the seatpost. Make sure the wire is between saddle rail and clamp holding saddle. Not sure if you can make this work on your folder.

You could get another seatpost and drill a hole trough the end and fit a disguised bolt in there but still only a delay.
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Old 02-10-13, 09:26 AM   #3
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Have seen this occasionally. Nothing is completely safe of course but it's not too likely that people would carry a chain tool

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Old 02-10-13, 10:03 AM   #4
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Just about anything you could do to 'secure' your bike or it's components would merely be a deterrent for the unprepared or opportunist thief but if the thief wants what you have, they'll get it. A hose clamp around the quick release of a seat post may prevent an easy snatch and grab but can easily be undone by even the casual resourceful thief who could use a scrap of trash lying around or even a zipper pull to undo the hose clamp and take off with your post and saddle.
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Old 02-10-13, 12:00 PM   #5
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#1, do you have a bike with a telescoping seat post *, as part of its fold ?

Answer : yes or no. if no what is it?


you could run a cable up inside the seat post tube, and anchor it to the frame, somewhere..

maybe even pre set your saddle height so it comes tight at that height.

*Brompton has a flare at the bottom of it's steel seat post.. so it has to come out from the bottom, after removing the saddleclip.







.....

Last edited by fietsbob; 11-30-17 at 10:13 AM.
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Old 02-10-13, 04:21 PM   #6
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Hi,

Drill a hole in it very near the end and put a small padlock through it ?

rgds, sreten.
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Old 02-10-13, 04:55 PM   #7
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Best bet is to carry a small cable with you and when you lock up drop the saddle,run the cable through(not trough) the saddle,then through your U lock as you would a cable for securing your wheel. Actually,since you probably have a QR on your front wheel,it would be a good idea to just carry a long cable and loop it through the wheel and saddle to secure the wheel,seatpost,and saddle.
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Old 02-10-13, 05:15 PM   #8
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They sell locking seat post bolt, and wheel quick release kits. There are a few good ones that have a special key. There are a few brands. Google is your friend. Google something like "locking seat post bolt". The only drawback to some of them, is that if you lose the one key, it's time to get out the grinder.
I have the "On Guard" brand wheel locks, they are extremely secure. Much better than cables etc. No grinder no way to defeat them.

http://www.google.com/search?q=locki...hrome&ie=UTF-8.

I have these, just for wheels, but a good example of extreme security

http://www.pricepoint.com/detail/214...15&zmap=21407&
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Old 02-10-13, 06:58 PM   #9
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Nothing is fool proof. Putting a bar clamp at the bottom will stop some thieves (as will the other suggestions here).
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Old 02-10-13, 11:45 PM   #10
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Thanks for the suggestions. I think drilling a hole in the tube seems to be the most simple. Perhaps just doing it on one side and putting a small screw in there.

I need to fold and, thus, lower my seatpost frequently like when I put it in the back of my small Toyota. The locking seat post ring/bolt won't work.

The long cable probably wont work as it would be something extra I need to carry. Also, I don't leave my bike outside too often. Maybe just 1 day a week.

Not too worried about wheels since I don't think thieves really dig small 20" wheels. Unless they are those reduced spoke V type that look like a racers, which I assure you my Dahon does not have. I would think 20" wheels would be linked to kids bikes (in a thieves' eyes)=less resale value.
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Old 02-19-13, 09:49 AM   #11
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You could always ziptie one of those little luggage combination locks behind (!) the chain stays. Unobtrusive and light:


Fixing under the saddle would work too, obviously - invisible solution and away from road muck...

Last edited by Elvis Shumaker; 02-19-13 at 09:53 AM.
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Old 03-02-13, 11:33 AM   #12
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Hi,

I read about a very good idea elsewhere but can't remember where.

If there is some form of step inside the seattube (on my bike the
end of the plastic insert), then drilling a small hole and a tiny self
tapping screw can serve two purposes. It can act as a stop for the
your preferred highest seat height and prevent theft, probably a
opportunist thief wouldn't notice the screw and wouldn't be able
to work out why the seatpost won't come out.

If this is what you meant by a screw all along, then I didn't twig.

rgds, sreten.
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Old 11-29-17, 09:27 PM   #13
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After lowering the saddle, insert a padlock through the hole drilled in the seatpost so that the thief can't pull the whole thing off the bike.

To secure the saddle itself, use threadlock/crazyglue, and stick a tiny ball in the head of the allen nut. To remove it, either spray some degreaser (threadlock) or use a lighter (crazyglue).

Obviously, cutting a padlock is a no-brainer for any self-respected bike thief who should be shopping around with a bolt cutter anyway, but it's good enough to secure your saddle from casual theft.

--
Edit:
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File Type: png Dahon.saddle.theft.prevention[1].png (175.9 KB, 41 views)

Last edited by Winfried; 11-30-17 at 12:48 PM.
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Old 11-29-17, 10:06 PM   #14
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Saddle theft solution: https://fortifiedbike.com/collection...ant=3882587717
and a saddle leash,
or take it with you.
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Old 11-30-17, 09:19 AM   #15
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The link doesn't explain why it's supposed to be secure.

I don't see the point of taking the saddle with me if there's an easier alternative.

Last edited by Winfried; 11-30-17 at 12:49 PM.
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Old 11-30-17, 10:20 AM   #16
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the bolt takes a un usual L wrench , apparently, no end on picture offered .

It could be a Torx with a pin in the center, so the wrench would have a hole in the tip to clear the pin ..

that type of security bolt would not be new, just a retailer marketing the ones they got sourced.





.....
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Old 11-30-17, 12:19 PM   #17
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I am working with pinhead to make us a set for Dahons and Terns ... stay tuned
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Old 11-30-17, 12:45 PM   #18
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If you can come up with a cheaper alternative to secure saddles + wheels on regular folders, very good news.

While you're at it, ask them about how to secure Bromptons :-)
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Old 11-30-17, 01:06 PM   #19
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Under the table, mine comes into the Bar..

B hubs are not not QR, but the non Brompton made dynohub has a bolt skewer.. 74mm...
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