Here’s a clever thing that we saw at the Icebike show this week: Kryptonite’s new Gravity Line products allow you to lock your wheels so that the light-fingered can’t make off with them when your bike is locked up in town.

Admittedly this is not a new idea: as long ago as 2010 Zéfal were showing off their Lock’n’Roll skewers which promised a similar thing. Unfortunately they didn’t really deliver. These Kryptonite units are a lot more solid-looking though, and there’s options both for wheel nuts and for skewers. The skewers don’t use a quick-release, though, closing instead with an Allen key.

The principle is simple, and sound. If you lock your wheels on with a system that only works upside down, then once your bike is locked up in town it’s impossible for a thief to invert it and make off with your wheels. We’ll get hold of a set for testing as soon as we can to find out how they perform in the real world.