Abus Steel-o-chain reaches to fix the bike up to stuff. also have a Folding Bordo, more convenient.
If the object is closer..

another bike has a ringlock and a lock-up chain. AXA makes that stuff..

I have no clue as to the propensity of your town citizens to steal each others bikes.


A long wheelbase type cargo hauler, making deliveries would be a good place for a ring lock
to keep your bike from rolling.

add maybe a Chain to something , in places that throw whole racks, of bikes
into trucks and drive off with the lot.