The RS561 ring lock is designed for demanding cyclists who don't compromise on technology and safety.
At the center is the robust 8.5 mm shackle made of hardened steel, now in a square shape to significantly increase resistance to bolt cutters and saw attacks. In case of manipulation, a special twisting mechanism ensures that the shackle locks itself within the lock housing – a detail that makes the difference when it counts.

The housing has also been consistently designed for maximum stability: Instead of riveted components, a fully welded steel shell is used, which completely eliminates side access points.
The RS561 is also fully compatible with the plug-in chain system from TRELOCK. This allows the bicycle to be additionally secured to fixed objects with a single movement – efficient, simple, and safe. The construction is complemented by a newly developed high-security cylinder. Its asymmetric milling, protected recesses, and improved coding technology make unauthorized opening attempts an almost hopeless endeavor.