Technically not Tern GSD specific but:

REI has a 20% off a single item right now for members (you're a member right?). While you can't use it on a Tern GSD, you \_can\_ use it on the [crazy expensive angle grinder resistant Hiplock D1000](https://www.rei.com/product/216211/hiplok-d1000-bike-lock).

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There's been a few posts on this sub about the best way to lock the bike, and for folks like myself the best answer is really two \_good\_ locks. I've got a Kryptonite fahgettaboudit and I'll be adding the Hiplock to the arsenal now for longer lockups.