Thieves aren't just interested in bicycles. Spare parts are also at risk.
The Abus NutFix M5 anti-theft saddle nut will save you the unpleasant surprise of having your seatpost stolen.
Using patented technology, the system relies on gravity: when the bike is on its wheels, the mechanism is locked. To unlock, the bike must lie on its side.
31.8mm seat clamp
The clamp is tightened with an 8 mm open-end wrench.