Originally Posted by v1nce

Abus Steel-O-Chain 810... there is nothing better for the price and weight, forget U locks (weaker to many forms of attacks and less flexible) forget OnGuard or Kryptonite, they are not quite in the same league as aforementioned. May be a bit hard to source but well worth it. If you want to know exactly why you can search an old post of mine in that i explain all the research i did in the locks and why i think the Steel-O-Chain is the best lock for most applications.