I use the Soma Anti-Jack mini D lock - small enough for a back pocket, not as heavy as the Krytonite equivalents. And it's great for using as a front wheel-to-frame lock when you have a secondary lock as well.
@ReekBlefs started
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I use the Soma Anti-Jack mini D lock - small enough for a back pocket, not as heavy as the Krytonite equivalents. And it's great for using as a front wheel-to-frame lock when you have a secondary lock as well.