Is this a good enough chain and lock combo???



johnwalker1

New Member
Feb 21, 2020
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Hey, my last bike got stolen from campus when I was using a Kryptonite Keeper standard U-lock. So with my new bike I bought an Abus 10ks 10 mm hardened steel security chain and the Abus diskus 20/70 with hardened steel shackle as well as a steel cable extender by Kryptonite to secure the bike completely (it is fairly expensive).

Is this enough or should I return these and purchase the Abus 12ks 12 mm hardened steel chain and Abus Granit 37/60 for even more protection? I do not want to use U-locks or all in one chain locks. I can get the components that constitute them for cheaper.
 

dabac

Well-Known Member
Sep 16, 2003
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At that level, it really doesn’t matter. An angle grinder will go through either in less than 30 seconds. And both will take considerable effort to beat with bolt cutters.
 

Froze

Well-Known Member
Jul 13, 2004
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There isn't a lock made that a battery powered angle grinder with a new carbide blade can't defeat in less than a minute, some will take upwards to minute but most are about 30 second range.

The problem with your situation is you are parking the bike someplace and leaving it unattended and out of your sight for a few hours, that's bad but there's nothing you can do about it either except for one thing, buy a less than $250 used bike and park that instead and save your nice bike for weekend rides! Also park your bike next to more expensive bikes so the thief would move to one of those instead of yours. Make that used bike look beat up, hit the frame a few times with a chain to mar it up, keep it dirty (just keep the components and chain clean to prevent mechanical problems). When you have a bike like that you don't need to spend $100 or more on a lock which saves you money, you won't need to lug around a heavy lock system either which put less burden on the weight you need to carry. At the most you would need is the Oxford OF159 HD chain 9.5mm square link chain that comes with a double locking padlock for less than $40!, but since you already bought a lock system then use that.
 

minati1

New Member
Jun 24, 2020
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The Abus line is a good source for locks and the shrouded lock is the right choice for a bike. The 7/16" shackle is as big as you can get with the chain size you quote. I have to ask though, is that chain as big as you are willing to go? Think of the value of the bike to make that decision. Finally, the Abus Rock 83/55 comes with many possible cores. You need to go with a high security core to make it more pick resistant.
 

Froze

Well-Known Member
Jul 13, 2004
4,711
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NE Indiana
The Abus line is a good source for locks and the shrouded lock is the right choice for a bike. The 7/16" shackle is as big as you can get with the chain size you quote. I have to ask though, is that chain as big as you are willing to go? Think of the value of the bike to make that decision. Finally, the Abus Rock 83/55 comes with many possible cores. You need to go with a high security core to make it more pick resistant.

But it's not picking that's causing lock problems, it's angle grinders, bolt cutters, and pry bars, picking is more of art and isn't done widely, it is done, but it's much more rare then using various tools.
 
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Yojimbo_

Well-Known Member
Apr 17, 2005
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What Froze said...get a beater bike and save your good one for when you don't have to leave it alone.
 

minati1

New Member
Jun 24, 2020
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But it's not picking that's causing lock problems, it's angle grinders, bolt cutters, and pry bars, picking is more of art and isn't done widely, it is done, but it's much more rare then using various tools.
yes you may be right about it.