Why was the name Kryptonite chosen for the bike lock company?

Answer

It references a substance that weakens Superman

The brand name was selected as a direct nod to the fictional substance from comic books that is famous for weakening Superman. The intent behind this moniker was to convey a message of strength and invincibility to the consumer. The creators reasoned that if their namesake could weaken the Man of Steel, their locks would possess the necessary resilience to stand up against the strongest and most determined thieves.

Why was the name Kryptonite chosen for the bike lock company?
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