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Cannot open bike wheel! (5-sided screw)

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Cannot open bike wheel! (5-sided screw)

Old 11-29-08, 05:38 AM
  #1  
mmphd
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Cannot open bike wheel! (5-sided screw)

Hi, I bought this bike second hand and recently got a flat. To my surprise, when I searched my tool box, i could not find anything that fitted inside this 5 sided screw. Could anyone please tell me what this 5-sided pentagon shaped (not hex) requires to be opened. If you also know the size, that would be excellent.

This is what it look like:

Thank you all for looking.
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Old 11-29-08, 05:48 AM
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It's an anti-theft device.

I'm giving you the benefit of the doubt. The guy that you bought the bike from, if he had acquired it honestly, should have the necessary tool.
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Old 11-29-08, 10:26 AM
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If you can't find the original tool, start with a rod of steel a vice, a file and lots of elbow grease
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Old 11-29-08, 03:40 PM
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Originally Posted by Berre View Post
If you can't find the original tool, start with a rod of steel a vice, a file and lots of elbow grease
You don't need to do that. Simply tighten the cones on the rear hub - anti-theft defeated in about 10 seconds. Even pitlocks aren't immune to this.
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Old 11-29-08, 05:04 PM
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I'm still wondering how the OP acquired this bike or who he bought it from. If he had brought that bike into my shop for any reason, I'd have had the cops down to run the serial number.
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Old 11-29-08, 05:06 PM
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Originally Posted by operator View Post
You don't need to do that. Simply tighten the cones on the rear hub - anti-theft defeated in about 10 seconds. Even pitlocks aren't immune to this.
Smart technique operator.
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Old 11-30-08, 02:55 AM
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Originally Posted by operator View Post
You don't need to do that. Simply tighten the cones on the rear hub - anti-theft defeated in about 10 seconds. Even pitlocks aren't immune to this.
Cones are not always in reach.
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Old 11-30-08, 08:24 AM
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(Before purchase, I asked the seller multiple times if the bike was illicit and he replied "no". Before this happened, I did not have any need for the key and this special screw only caught my eye when I need to remove the wheel. I can ask him in the next several days, but for instance if he has lost it, or I don’t get a hold of him, I am in a real sticky situation.)

I am not sure if you guys can see but there is another layer of metal covering the screw which voids access to it from the top. The top cover is circular as well so it is almost impossible to grip.
If you guys require more pictures of the bike, please let me know.
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Old 11-30-08, 08:33 AM
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Originally Posted by mmphd View Post
Before purchase, I asked the seller multiple times if the bike was illicit
What exactly were you expecting him to say? "Yes I stole this bike, I shot the owner, stamped on his dog and pissed on his corpse before I rode off".

No security screw will last once you've got the screw in a workshop equipped with tools. You could file a notch into it, drill it out, epoxy a larger socket onto it, etc.
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Old 11-30-08, 08:51 AM
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Here are some more pics: A tilted angle of the screw;birds eye view of the screw;the other side of the wheel.



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Old 11-30-08, 09:48 AM
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Originally Posted by daintonj View Post
What exactly were you expecting him to say? "Yes I stole this bike, I shot the owner, stamped on his dog and pissed on his corpse before I rode off".
Same thing goes for the OP.
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Old 11-30-08, 10:01 AM
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Originally Posted by mmphd View Post
(Before purchase, I asked the seller multiple times if the bike was illicit and he replied "no".
If you felt it necessary to ask "multiple times if the bike was illicit", then your gut was telling you that it was indeed stolen.
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Old 11-30-08, 10:27 AM
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+1 Stolen bike.
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Old 11-30-08, 10:30 AM
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You can go for the destructive approach: grind the nut off. That will destroy the axl also; a new one costs about $10. If you can work carefull enough, grind two flat sides on the nut so it will fit an ordinary wrench.
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Old 11-30-08, 11:10 AM
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Vice-grip?
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Old 11-30-08, 11:14 AM
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has anyone reported this thread? we shouldn't be helping someone work on a stolen bike
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Old 11-30-08, 02:15 PM
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Originally Posted by unterhausen View Post
has anyone reported this thread? we shouldn't be helping someone work on a stolen bike
The OP can't resize photos, doesn't know that it's best to have the lights on when taking photos and has not yet discovered the macro button, could be they're not the sharpest tool in the box. So considering we can't prove it's stolen I think we should give them the benefit of the doubt and help them. It's not as if some hardened thief is going to give up on their life of crime because people on the internet wouldn't help them.
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Old 11-30-08, 03:14 PM
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Looks like may well be one of these.

https://www.brycefastener.com/pentanut.htm

I would contact them regarding wrench availability though it may only be available to licensed businesses.
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Old 11-30-08, 03:19 PM
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Originally Posted by daintonj View Post
So considering we can't prove it's stolen I think we should give them the benefit of the doubt and help them.
Nope, not me.
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Old 11-30-08, 03:24 PM
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Oh FFS, why is this thread even here.

I already posted a solution about 30 posts back that does not require idiotic destructive removal. Seriously. Who cares if it's stolen or not. What are you going to do? Reach out over the internet, find the owner, the the bike from the OP and return it?
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Old 11-30-08, 04:06 PM
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Originally Posted by operator View Post
I already posted a solution about 30 posts back that does not require idiotic destructive removal. Seriously. Who cares if it's stolen or not.
Well, Operator, if you're not part of the solution you're part of the problem.
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Old 12-01-08, 10:01 AM
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I'm disinclined to help someone with a stolen bike, myself. Why would I?
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Old 12-02-08, 01:49 PM
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Originally Posted by Joshua A.C. New View Post
I'm disinclined to help someone with a stolen bike, myself. Why would I?
Let me stress that this bike is not stolen. This thread has turned into a moral debate rather than a technical one. I asked the seller yesterday to provide me the key, he told me that he will give it to me in the next several days. I asked how to open it with out the key so I could be up and running with out have to wait. I am very happy with all the helpful responses but please, only post if it helps the situation, otherwise there is no need.
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Old 12-02-08, 03:26 PM
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There isn't really even any need to pull out the cone wrenches when to remove these cheap anti-theft skewers without the key. It's as easy as grabbing the nut opposite the 5 sided socket with a pair of Vise-grips and spinning it open. The knob is often even knurled to make this operation easier.

This all goes to show, of course, how marginally effective these "anti-theft" skewers are. Sure, they require tools and take a bit longer to remove than a quick release, but a bolt on wheel probably takes a bit longer (since the thief has to loosen both sides, not just one).

Pitlocks and Pinhead skewers (available in Canada, I don't know about elsewhere) are nicer since they don't have any convinient places to grab on to. I never thought about the cone thing though. Thanks for making me more paranoid, Operator!

Anyway, lock 'em where you can see 'em, and if you steal bikes or support thieves, you'll get yours in the end.
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Old 01-03-09, 04:24 PM
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Just posting to say my girlfriend lost my key to my pinhead skewers this week, and I was feeling pretty stuck until I read this thread. I was able to tighten my cones and remove the wheels fairly easily. The back wheel was tougher and took a lot more finagling, but it worked. Thanks for the advice!
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