Lock Down Your GSD’s Most Stolen Parts
This Pinhead lockset replaces the standard hardware on your Tern GSD Gen 2 seatpost clamps with keyed, tamper-resistant fasteners. Once installed on the upper and lower clamps, it keeps your seatposts fixed to the bike so saddles can’t simply be slipped out and walked away with.
The locks stay on the bike full-time and still allow quick saddle height changes using the dedicated Pinhead key and a 15 mm wrench. It’s a clean, low-profile solution that adds real security without changing how you and your family use the bike day to day.
Simple. Solid. Reliable.
- Purpose-built lockset for Tern GSD Gen 2 seatpost clamps; also compatible with HSD Gen 2 using the same clamp layout.
- Secures both upper and lower seatpost clamps to help prevent saddle and post theft.
- Keyed system uses a unique Pinhead key pattern for each set, with code for ordering matching locks or replacement keys.
- Convex locking design resists common theft tools like pliers, universal sockets, and bolt cutters.
- Low-profile hardware integrates neatly with the frame and won’t interfere with riding or loading kids and cargo.
- Corrosion-resistant construction is built for all-weather daily use.
