Two locks is the practical sweet spot for everyday parking, plus a tracker as your safety net. One lock is a single problem for a thief to solve; two locks of different types roughly doubles their time, tools, and exposure — and that's usually enough to send them toward an easier bike.
How to structure it:
- Lock one: a chain through the frame to a solid anchor. This defends against the van lift, the method that ignores every other lock.
- Lock two: an alarmed disc lock on the front wheel. Different attack required, plus instant noise the moment the bike is disturbed.
- At home, add a third layer if you like — ground anchor, wheel clamp, or a cover with a locked grommet — since weight doesn't matter in your own garage.
Two principles matter more than the count. First, variety: two different lock types force two different tools, while two identical locks fall to the same one. Second, honesty: every lock is beatable with power tools and time, so the final layer shouldn't be another lock — it should be a hidden GPS tracker with motion alerts, so your phone knows the second the bike moves and you have a live location if the locks lose.
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