Go Back  Bike Forums > Bike Forums > Electronics, Lighting, & Gadgets
Reload this Page >

In theory how long would it take to cut through kryptonites best lock in the wild

Notices
Electronics, Lighting, & Gadgets HRM, GPS, MP3, HID. Whether it's got an acronym or not, here's where you'll find discussions on all sorts of tools, toys and gadgets.

In theory how long would it take to cut through kryptonites best lock in the wild

Old 06-23-22, 09:28 AM
  #1  
jxpowers
Junior Member
Thread Starter
 
Join Date: Oct 2012
Posts: 114
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Likes: 0
Liked 1 Time in 1 Post
In theory how long would it take to cut through kryptonites best lock in the wild

Im talking about the FAHGETTABOUDIT lock In particular.
18mm of hardened steel

I've seen videos of people cutting thru it with angle grinders while locked into a vice and going thru several disks before making it thru.

But how does it fare in a real world situation when you have the lock moving around. In theory how much time does it buy you for the most determined thief?
jxpowers is offline  
Old 06-23-22, 09:48 AM
  #2  
base2 
Doesn't brain good.
 
base2's Avatar
 
Join Date: Jun 2015
Location: Pacific Northwest
Posts: 2,087

Bikes: 5 good ones, and the occasional project.

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 1113 Post(s)
Liked 761 Times in 452 Posts
Long enough that the people who thought you were engaging in theft would probably change their minds to thinking you were the actual owner who just lost the key.

Stick with it, buddy. Just be sure to be gone when the real owner shows up.

Last edited by base2; 06-24-22 at 01:11 AM.
base2 is offline  
Likes For base2:
Old 06-23-22, 10:53 AM
  #3  
Badger6
Obsessed with Eddington
 
Badger6's Avatar
 
Join Date: Jun 2013
Location: Brussels (BE) 🇧🇪
Posts: 1,264

Bikes: '16 Spesh Diverge, '14 Spesh Fatboy, '18 Spesh Epic, '18 Spesh SL6, '21 Spesh SL7, '21 Spesh Diverge...and maybe n+1?

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 500 Post(s)
Liked 567 Times in 347 Posts
So many variables. As already stated, stick with it. It’ll dissuade all but the most determined.

Last edited by Badger6; 06-24-22 at 12:10 AM.
Badger6 is offline  
Old 06-23-22, 09:44 PM
  #4  
tempocyclist
Full Member
 
tempocyclist's Avatar
 
Join Date: Jun 2021
Location: Australia
Posts: 439

Bikes: 2002 Trek 5200 (US POSTAL), 2020 Canyon Aeroad SL

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 147 Post(s)
Liked 324 Times in 165 Posts
Longer than it would take to cut through your frame.
tempocyclist is offline  
Likes For tempocyclist:
Old 06-23-22, 10:50 PM
  #5  
greatbasin
Junior Member
 
Join Date: Mar 2022
Posts: 178
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 133 Post(s)
Liked 65 Times in 53 Posts
It's usually easier to cut through the thing it's clamped to like a bike rack, sign or fence pole or whatever. Also, a grinder isn't the best tool for a Kryptonite. A hydraulic jack will pop them faster and without the grinding noise. A bottle jack is an easily available tool that will do the job, but an autobody tool called a Porta Power will give a better chance of setting up in an awkward position. One homey with a porta power and another with an air tank to drive it pneumatically and it only takes seconds.
greatbasin is offline  
Likes For greatbasin:
Old 06-23-22, 11:36 PM
  #6  
greatbasin
Junior Member
 
Join Date: Mar 2022
Posts: 178
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 133 Post(s)
Liked 65 Times in 53 Posts
I saw a video where someone failed to cut through a NY lock with a hydraulic cutter. This isn't how to use hydraulics.

If you look at the NY lock open, you will see that the hoop is 18mm thick steel, but the lock is held together by a tooth or pawl that is less than half that diameter.



You don't need to cut the hoop. You just need to put enough pressure on that little ramp pawl to pop it off. Use the hydraulics not to cut the hoop but to expand it until the pawl pops off. With the little kryptonites, it could be done with a mechanical bumper jack like a Hi-Lift, but hydraulics are smaller and way more powerful.
greatbasin is offline  
Old 06-26-22, 02:04 PM
  #7  
Calsun
Full Member
 
Join Date: Mar 2021
Posts: 482
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 194 Post(s)
Liked 109 Times in 85 Posts
The only true security is having the bike out of sight of thieves. The best currently available is the Hiplok D1000 that sells for $300 and is as close to grinder proof as you can find. Nothing to stop a thief from cutting through the bike frame or the post to which the bike is locked.

At US Davis in California where many of its 20,000 students ride bikes to get around the large campus there were the usual bike racks for 10 or more bikes. One time a flat bed truck pulled up and took the entire rack that had not been bolded to the concrete and lifted it with its bikes and put it on the truck. After that the university moved it bike racks further away from the road. A friend who was a student there painted his bike flat black and used cheap components for his university bike to make it less attractive to thieves.

I have only had a bike stolen one time when I used a cable lock to secure it to a post while I was in classes. After that I never left a bike unattended out in the open and none of my bikes have been stolen.
Calsun is offline  
Old 06-26-22, 02:22 PM
  #8  
N2deep
Junior Member
 
N2deep's Avatar
 
Join Date: Jun 2021
Posts: 197
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 75 Post(s)
Liked 86 Times in 56 Posts
A determined and organized thief will defeat the lock in seconds, locks are for show. Locks keep the opportunist from grabbing your bike. I believe the trick is to make your bike appear to be cheap or disheveled, park it in a place with a lot of traffic, write your name in an inconspicuous place, wrap the lock around the wheels and frame to make it look more difficult to unwrap or steal and hide a tracking tile somewhere on the bike.
N2deep is offline  
Old 06-26-22, 04:51 PM
  #9  
tcs
Palmer
 
tcs's Avatar
 
Join Date: Mar 2007
Location: Parts Unknown
Posts: 7,267

Bikes: Mike Melton custom, 1982 Stumpjumper, Alex Moulton AM, 2010 Dawes Briercliffe, 2017 Dahon Curl i8, 2021 Motobecane Turino 1x12

Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 1109 Post(s)
Liked 793 Times in 482 Posts
Originally Posted by greatbasin View Post
A hydraulic jack will pop them...
Don't use a lock as a talisman. Use thoughtful technique.

To increase resistance to jack attack, fill up the room inside the 'U'. Let 'em jack this guy's bike



instead of yours:

tcs is offline  
Old 06-26-22, 04:56 PM
  #10  
tcs
Palmer
 
tcs's Avatar
 
Join Date: Mar 2007
Location: Parts Unknown
Posts: 7,267

Bikes: Mike Melton custom, 1982 Stumpjumper, Alex Moulton AM, 2010 Dawes Briercliffe, 2017 Dahon Curl i8, 2021 Motobecane Turino 1x12

Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 1109 Post(s)
Liked 793 Times in 482 Posts
Originally Posted by jxpowers View Post
Im talking about the FAHGETTABOUDIT lock In particular: 18mm of hardened steel
I've seen videos of people cutting thru it with angle grinders while locked into a vice and going thru several disks before making it thru.
But how does it fare in a real-world situation when you have the lock moving around. In theory how much time does it buy you for the most determined thief?
So many variables. Angle grinder power, battery capacity, condition & quality of cutting wheel...

Looks like this miscreant's cutting apparatus pooped out before he got through the second leg:

tcs is offline  
Old 06-27-22, 10:20 AM
  #11  
greatbasin
Junior Member
 
Join Date: Mar 2022
Posts: 178
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 133 Post(s)
Liked 65 Times in 53 Posts
Originally Posted by tcs View Post
....

For that one, a Rigid tubing cutter or an exhaust pipe cutter will slice through the mild steel pole silently in seconds. Round tubing is a vulnerability because of these tools.

[img]https://m.media-amazon.com/images/I/..._AC_SX569_.jpg[/img]
greatbasin is offline  
Old 06-27-22, 02:34 PM
  #12  
tcs
Palmer
 
tcs's Avatar
 
Join Date: Mar 2007
Location: Parts Unknown
Posts: 7,267

Bikes: Mike Melton custom, 1982 Stumpjumper, Alex Moulton AM, 2010 Dawes Briercliffe, 2017 Dahon Curl i8, 2021 Motobecane Turino 1x12

Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 1109 Post(s)
Liked 793 Times in 482 Posts
Originally Posted by greatbasin View Post
For that one, a Rigid tubing cutter or an exhaust pipe cutter will slice through the mild steel pole silently in seconds. Round tubing is a vulnerability because of these tools.
That's why you run security chain through them.

tcs is offline  
Old 06-27-22, 11:21 PM
  #13  
greatbasin
Junior Member
 
Join Date: Mar 2022
Posts: 178
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 133 Post(s)
Liked 65 Times in 53 Posts
You're counting on someone else having done that. While it does look smart, I can assure you it isn't common practice even on dedicated bike racks. Often enough people resort to locking their bike to something else.
greatbasin is offline  
Old 06-28-22, 01:00 AM
  #14  
base2 
Doesn't brain good.
 
base2's Avatar
 
Join Date: Jun 2015
Location: Pacific Northwest
Posts: 2,087

Bikes: 5 good ones, and the occasional project.

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 1113 Post(s)
Liked 761 Times in 452 Posts
Originally Posted by tcs View Post
That's why you run security chain through them.

As of May 01, 2009 that patent expired due to failure to pay maintenance fees.

I think that anyone could build it & profit safely now. No?

A case hardened to 5/16 chain in a pipe, in a pipe, bent to shape & secured in concrete in some fashion.

The genius is the inner chain has more slack than the distance a reciprocating blade travels so no bite is ever taken out of the chain. Combined with the inner & outer pipes being bent at the same time means that the inner pipe is sprung, free to move & is set free once cut, if cut. The effect is to bind up/break/confound whatever tool it used in the attempt.

I'll bet it's an expensive rack. But if even half of the total racks of this type are installed...It would be a very frustrating day for a rack-cutting bike thief, indeed.

__________________
My lights are obscenely bright because drivers are dim.

I shouldn't have to "make myself more visible;" Drivers should just stop running people over.
base2 is offline  
Old 07-07-22, 06:35 PM
  #15  
dmanthree
Senior Member
 
dmanthree's Avatar
 
Join Date: Sep 2014
Location: Northeastern MA, USA
Posts: 1,592

Bikes: Garmin/Tacx Bike Smart

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 617 Post(s)
Liked 260 Times in 169 Posts
dmanthree is offline  
Old 07-10-22, 02:54 PM
  #16  
Bearhawker
Full Member
 
Join Date: Apr 2012
Location: Prince Edward Island, Canada
Posts: 239

Bikes: '19 Norco Bigfoot 6.1 (primary ride),'12 Motobecane Turino (killed by dog crash), '12 Trek 3700 Disc

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 120 Post(s)
Liked 97 Times in 59 Posts
How long does it take a portable plasma cutter to liquefy any of those locks?

Molten metal puts up essentially no fight
Bearhawker is offline  
Old 07-13-22, 11:12 AM
  #17  
ratell
Full Member
 
ratell's Avatar
 
Join Date: Mar 2008
Location: Portland, OR
Posts: 405
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 26 Times in 18 Posts
I was recently in Bern Switzerland. Most of the time bikes weren't even locked. If they were it was often a cable lock through a wheel not even attached to anything. Making it harder to sell stolen bikes seems to be more effective than trying to find a better lock.
ratell is offline  
Old 07-25-22, 01:08 PM
  #18  
texasdiver
Full Member
 
Join Date: Jul 2009
Location: Waco Texas
Posts: 214

Bikes: Cannondale F2000, Co-Motion Periscope Torpedo, and many more

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
I had to cut off a Kryptonite lock that was locked around the top tube of my daughter's mountain bike for which she stupidly lost the key.

Not knowing the best method and not being a pro bike thief I just looked in my shop for the appropriate tool, saw the acetylene cutting torch, grabbed it, and it took all of 5 seconds to cut through that Kryptonite.
texasdiver is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.