I use a Chain-lock, made by Abus and a folding 'Bordo' Lock by the same company (J&B sells them to shops)

and another bike I have an Axa ring lock on the frame that locks up the back wheel ,
and a chain by that same company with a pin that snaps in the side of the ring lock.
1.4M long .. wheel and around the post/bike rack.
I got that from Clever Cycles in PDX..

none stolen, but I dont live in PDX or Eugene , or SF , Arcata-Eureka, or any college town, anymore
where people target bikes to be stolen and stripped ..