Pinhead Seatpost/Saddle Lock Solid


Can be purchased using Cycle to work

SKU: 513314

Pinhead Locking Seatpost Collar or Saddle Lock for saddles mounted with a vertical bolt, with a Solid Axle Style Key.

Unlike a traditional lock, with Pinhead you can now protect specific components on your bike from theft. The unique Pinhead key system means that, unlike competitor locks of this type, they cannot be removed with a simple screwdriver. The Convex technology on Pinhead locks protects them from removal by hammer, pliers, picks, universal socket tools, grinders and bolt cutters.

Once installed, the lock (which can be used to lock either a saddle or a seatpost) remains permanently on your bike, even when you ride. When used to lock your saddle, the locking collar prevents access to the rear vertical bolt of the seatpost. When you need to adjust your saddle or seatpost, your Pinhead key lets you do this quickly and easily.

Pinhead locks use a special coded key that comes with each lockset. The key is ergonomically engineered to install and tighten your locks. Each key is different, and comes engraved with a nine-digit code so it can be replaced if lost. With your key code, matching locks can be ordered to protect your other components or other bikes.

Make sure to register your key code at so that if your key is lost, a replacement key can be made for you.


  • Protection for: Your saddle or your seatpost
  • Replaces your existing seatpost clamp if it is used to lock your seatpost
  • Easy, one-time installation
  • Lock installed weight: 41g
  • Materials: Precision forged Cro-Mo steel and aircraft grade aluminium alloy
  • Online lost key replacement available for keys registered with Pinhead
  • Protected by a lifetime warranty


  • 1 x 37mm Skewer
  • 1 x Collar
  • 1 x Shim to fit all seatposts (from 28.6mm OD to 31.8mm OD)
  • 1 x Washer
  • 1 x Rubber cap
  • 1 x Lock Bolt
  • 1 x Unique Pinhead Solid Axle Key

Specification Overview

More Information
Brand Pinhead
Type Seatpost Locks
More Information
Eligible for cycle to work Eligible for cycle to work
Primary Colour Black
Brand Pinhead
Type Seatpost Locks
Locking Mechanism No
Sold Secure Rating No
Length No
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Free Build and Delivery

Free delivery is available on all bikes sold by us. To find out exactly when you’ll be able to get your new bike, take a look at the available delivery options in the checkout.

All of the bikes we sell online are built and inspected by our qualified mechanics – just like when you buy a bike from one of our stores. All you’ll need to do when you receive the bike is straighten the handlebars and attach one of the pedals. This service is free, and included every time you buy a bike.

To find out more about bike delivery, as well as our easy returns service, head over to our delivery and returns page.