-
FYI the 19mm chains are about 40% heavier than that 16mm. (6.3kg per metre, vs. 4.5 kg per metre, same for ours and Almax's.) More bulky and a lot harder to handle (carefully). Some of our customers with a series of previous thefts have fabricated a shelf bracket-like support to take the weight of a 19mm chain so it doesn't all rest on the bike. If the thieves keep coming back then you have to do something to stop them, but a 19mm chain on a push bike is getting extreme IMHO.
OK I got the Almax Immobiliser III. Jesus fucking christ, its fucking heavy...
FWIW I'm using it to secure a scooter...