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It's a combination code system to protect your wheels and saddle

Combination code wheel skewers and saddle clamp bolts from Australian brand Sphyke are now available in Europe for the first time.

With Sphyke’s C3N system, you replace your wheel's quick-release skewer with a bolt-on skewer, and you can only access the bolt once you’ve entered a three-letter code.

Check out the video to see how it works…

A front and rear skewer set is priced at €42 (about £35).

You can replace a saddle clamp quick-release bolt with one that uses a combination code system for €22.95 (about £19). You can also get complete combination saddle clamps in various diameters, starting at €25.90 (about £22).

Sphyke do an A-Head stem lock for €24.90 (about £21), and saddle locks for €22.95 (about £19)

The idea is that C3N makes it much harder for anyone to walk off with your wheels or saddle when your bike is locked in a public place. You’re securing the components to the bike without the need to carry an additional cable lock. It reminds us of the Pinhead locking fastener system – although Pinhead uses a key rather than a combination code.

You can buy online through the Sphyke website and you currently get a 20% discount if you buy more than one product. Sphyke are in the process of selecting a limited number of independent retailers in London.

Mat has worked for loads of bike magazines over 20+ years, and been editor of 220 Triathlon and Cycling Plus. He's been road.cc technical editor for eight years, testing bikes, fettling the latest kit, and trying out the most up-to-the-minute clothing. We send him off around the world to get all the news from launches and shows too. He has won his category in Ironman UK 70.3 and finished on the podium in both marathons he has run. Mat is a Cambridge graduate who did a post-grad in magazine journalism, and he is a past winner of the Cycling Media Award for Specialist Online Writer.