Seatylock X-LOCK Seatpost Clamp — Anti-Theft Saddle Security (Includes Key)

Lock your saddle height and keep your seat from walking away. This X-LOCK clamp replaces quick-release seatpost clamps with a tamper-resistant security head that tightens using the included proprietary key. Ideal for commuters, campus bikes, and e-bikes parked outside.

Highlights

• Anti-theft clamp with security key (replace your QR clamp)

• Aluminum body with low-profile, tamper-resistant head

• Smooth inner surface to protect the seatpost; hex-tightened key tool

• Sizes offered by Seatylock: 28.6 / 30.0 / 31.8 / 34.9 mm (choose your frame’s seat-tube size)

• Quick install: slide old clamp off → slide X-LOCK on → tighten with key

What’s included

• X-LOCK seatpost clamp

• Security key tool

• Quick start info

Compatibility notes

• Works on frames that use a standard external seatpost clamp (round seat tubes).

• Choose size that matches your frame’s seat-tube OD (usually printed on the old clamp; if not, measure with calipers).

• Not for integrated/wedge-style seat clamps.

Condition: New in retail package (see photos)