It depends what you want the lock for. If you locking up an old Schwinn collegiate or Royce Union 10 spd outside TGIF while you have dinner a few microbrews that lock may be OK. If you locking you '90 Colnago Master up behind the GAP for your 8 hour shift you need a few Kryptonite locks.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk