£68 here - https://saundersonsecurity.co.uk/lincmaster-eyelok.html
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Everyone has missed my point. It was not about the alarm. It was about the immobilising effect of a small chain around the rim - they probably won’t cut through it like people cut through the discs themselves
they’ll just cut through the chain!
So the point of an alarmed chain is not the alarm?
You can already buy chains, and plenty of people already wrap them around their rims and frames, so I am not sure what is new if not the alarm?
When I used to bother with a chain, even if there was nothing to lock the bike to, I would still wrap it through the wheel and frame. Also make sure none of it is on the ground so that you cannot get any purchase to use bolt cutters.
But unless you carry an especially thick (and especially heavy) chain around, then it can still be cut off with an angle grinder. And a thicker one only increases how long it will take someone to cut it.
To save carrying around a heavy chain I had stopped using, I bought a lighter “armoured steel cable lock” as recommended on a forum. I take it everywhere in my top box. I have still never used it. But it is there in case I park anywhere that feels to dodgy for a motion alarm and disc lock.
Exactly which is better than having to pay for a new disc plus labour (once the bike is recovered as I have a tracker)
My idea is that you use a short chain but very thick around the rear wheel. Like 20cm on length
ahhhh so what you mean is the chain could be the same weight as a normal one but because it’s shorter it can be thicker? therefore harder to cut.
For opportunist joy riders it is overkill. For those determined to get your bike they will just take the wheel off (or the take the extra time to still cut the chain, or the lock which is increasingly a weaker point the thicker a chain gets) which is why you should wrap a chain around the frame too.
But for being stupidly expensive and not available for my bike, I still like the Roadlok.
But the only time anyone tried to take my bike, which is not particularly desirable, they were thwarted by a £9.99 micro disc lock. Thankfully, as the alarm failed. (And it has a proper key, not the sort defeatable by a cheap biro as in the photos.)
https://www.sportsbikeshop.co.uk/motorcycle_parts/content_prod/74349
Get two, one back and front. Or more to make them work for it. Several simple tasks can end up taking as long as a single more difficult one. Not that I would recommend it as the only security in any situation.
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If you just want to make it as hard to cut as possible, a D lock is a more efficient lock.
These are pretty grinder proof but it won’t stop the bike being lifted into a van
https://londonbikers.com/t/grinder-proof-lock/110827/3