Pinhead Seatpost Clamp
Best security upgrade for urban commuters protecting expensive bicycle components.
This security hardware replaces standard seatpost fasteners with a proprietary, keyed locking system. It offers a simple yet effective way to deter saddle theft, ensuring that the seatpost remains firmly attached to the frame. It is a practical upgrade for commuters who frequently lock their bikes in public areas.
$69.99
at
Velo Mine
More Seat Collar Lock options
Who it's for
- Urban commuters parking their bikes in high-theft public areas
- Weight-conscious cyclists seeking security without compromising their bike's clean lines
- Year-round riders who frequently encounter rain, snow, or road salt
Who should skip it
- Forgetful riders who struggle to keep track of specialized small tools
- Home mechanics who prefer standard hex bolts for easier torque management
- Owners of custom or vintage frames with non-standard seat tube diameters
Performance breakdown
Theft Deterrence
Proprietary key pattern makes standard tools useless for opportunistic thieves.
Installation Simplicity
Straightforward swap that replaces standard hardware in just a few minutes.
Build Durability
Robust construction withstands harsh weather and daily urban abuse.
Compatibility Range
Versatile design fits most standard frame and seatpost diameter combinations.
Key Management
Losing the unique key requires ordering replacements directly from the manufacturer.
Weight Penalty
Slightly heavier than standard aluminum clamps due to the locking mechanism.
Key Specs
Clamp Type
Seatpost Clamp
Compatibility
Universal fit for all frame and seatpost sizes
Mechanism
Uniquely keyed locking bolt
Included Parts
Locking bolt, key, collar, and shim
Clamp Diameter
31.8 mm
Compatible Diameters
28.6 mm, 31.8 mm
Know before you buy
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Ask Metto anything about the Pinhead Seatpost Clamp before you decide.