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Cable Lock: 0, Pliers: 1

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  1. Uberuce
    Member

    Inspired by Greenroofer's latest Spot(of an evidently near-instant slicing of braided cable lock at Meggetland Tesco), I've just dug out my upstairs neighbour's Abus cable combination lock, which I kept as a souvenir after cutting through it when she forgot her code and asked for help. And cut it a couple more times in the interests of For Science.

    It looks almost exactly the same width and general robustness as my Kryptonite lock's cable, and only causes a mild hesitation before my bolt croppers chomp right through it.

    I timed myself, and while I can confidently say it's under two seconds, I don't know it was under one since I don't know how much time I spent getting my hands from stopwatch to handle and back.

    They're medium sized at 45cm of arm length.

    I'd imagine smaller croppers would replicate the feat if you were burly or could get them on the ground, which you probably always can with cables.

    It took 1:23 to get through it with a pair of pliers. It's some comfort to know that I found it extremely hard, and I can say with some evidence that I'm unusually strong in this regard - it's almost exactly like using torsion grippers, which back in the day I trained with obsessively and still dust off the shelf from time to time.

    Less comforting is the fact I was racing the clock and found in an untimed testing cut that you can gnaw away at the cable and make much slower progress. I'd hazard a guess at 5-10 minutes.

    Posted 11 years ago #
  2. Roibeard
    Member

    Sorry folks - braided cable is a visual deterrent only, even if "armoured".

    Security is really only supplied by solid (heavy) lumps of metal, with as thick a cross-section as you can bear (in all senses). 16mm is too thick for most manual tools, so that's the starting point.

    Unfortunately even most D-locks start at 12-14mm (ignore the plastic coating), but fortunately that will defeat "normal" sized bolt croppers (arm length). Leg length croppers are a bit more expensive, and much harder to nonchalantly carry through the streets.

    Robert

    Posted 11 years ago #
  3. Uberuce
    Member

    I saw a pair of leg length croppers at the Omni car boot sale, ages ago. To this day I regret not buying them, not because I have any need for such monsters, but because I know 100% that I am not a thief, whereas I cannot say the same of whoever did buy them.

    I suspect everyone here knows cables can't defeat a properly equipped thief*, but I really did think they'd defeat my humble pliers.

    *technically a meaningless statement, since ultimately a thief of sufficient resources could use an industrial laser, and you need science fiction to defeat them.

    Posted 11 years ago #
  4. SRD
    Moderator

    When I bought my combination cable lock, I saw in one of the reviews that it could be cut through in 2 seconds.

    But really it is there for my peace of mind, and to deter opportunistic theft.

    Posted 11 years ago #
  5. Uberuce
    Member

    Indeedy. Even Tiddles the tiger can be circumvented by a thief equipped with a haunch of gazelle, but how many scrotes carry one of them?

    Posted 11 years ago #
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    Posted 11 years ago #
  7. crowriver
    Member

    Cheaper D-locks can be 'bounced' open within 3 or 4 thumps with a standard hammer. No cutting required. So I don't think they are much more secure: takes about 30 seconds if your aim is true.

    Haven't tried this on expensive D-locks which I'm assuming are more robust.

    Posted 11 years ago #
  8. Nelly
    Member

    All locks are only deterrents for the casual and poorly equipped thief.

    None of us would leave a good bike overnight in the street - even with some kryptonite gold standard lock.

    Bottle jacks will blow apart any D-lock but not easily explainable to 'the law' if caught in possession.

    Posted 11 years ago #
  9. Darkerside
    Member

    Industrial lasers you say?

    Hmm...

    Ladies and Gentlemen, get your mirror surface D locks here! Glass; the perfect protection for your beloved steed!

    Posted 11 years ago #
  10. skotl
    Member

    My neighbour moved flat and lost the key to his £120 D-lock in the process (not sure whether he told me the make/model, just the price).

    I lent him my petrol-powered generator and an angle grinder and he spent a happy, and EXTREMELY NOISY, ten minutes cutting through it.

    When he returned the kit I asked whether anyone had challenged him; "nope - quite a few people gave me a funny look as they walked past but I just smiled at them and carried on".

    Posted 11 years ago #
  11. Snowy
    Member

    I just bought a new ABUS D-lock, of the 'sold secure gold' variety. At 1.5kg, it's about 15% of the weight of the bike it's used on.

    RE leaving the bike on the main road, the main thing that puts me off doing so is the likelihood of damage from some drunken loon. Living round the Meadows, this is not a hypothetical scenario...there's a lot of evidence.

    Posted 11 years ago #
  12. Radgeworks
    Member

    the ALMAX wall of shame
    I watched these videos on how quickly cables and some of the more expensive locks can be cropped very quickly indeed, its very interesting stuff, and some scarily quick crops. I only use an ALMAX chain for long term and overnight locking of my bike.

    Well worth a look for scientific purposes.

    RJ

    Posted 11 years ago #
  13. fimm
    Member

    OT... "Leg length croppers are a bit more expensive, and much harder to nonchalantly carry through the streets."

    A friend is into historical re-enactment (i.e. playing at fighting battles) and therefore has an occassional need to carry (I assmue very blunt) swords & stuff. He tells this story: when he was at university, he and a group of friends were carrying such a sword from A to B, wrapped in something or another, when they were stopped by the police. They rather nervously explained what they were doing and showed him the sword.
    "That's OK," said the policeman, "I thought you had a set of boltcroppers there for stealing bicycles..."

    Posted 11 years ago #

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