Trelock BC 680

The Trelock BC 680 is the chain lock you buy when you need to tick a Dutch insurance box (ART-2) without spending 80 euros. Trelock is a German manufacturer with a long tradition of OEM locks for bike brands like Gazelle and Batavus, and the BC 680 is their classic mid-tier product: a 110 cm chain in a textile sleeve, with a cylinder lock at one end and a simple but effective ART-2 certification. It is not a glamorous product, but for the commuter riding to the station and wanting to know their insurance is valid when they get home, it does exactly what it needs to. Quality is solid without surprises. The links are hardened steel and handle bolt-cutter attacks at the normal prosumer level — no better than that, but enough to pass the ART-2 test. The textile sleeve is soft and firmly stitched and keeps the lock from scratching a city bike frame or cargo-bike panel. The cylinder is a standard Trelock disc cylinder, functional and smoothly turning, but without the anti-pick refinement of an ABUS X-Plus or Kryptonite disc cylinder. For realistic theft methods — bolt cutters, saws, brute force — the cylinder is not the weak link; for picking attacks in theory it is, though picking is rarely the scenario in Dutch street bike theft.

The 110 cm length is where the BC 680 stands out. Most ART-2 chain locks at this price sit at 85 or 90 cm, and that is tight when you need to weave between two other bikes at an NS station, or chain a cargo bike to a thick post. Those extra 20 centimetres buy meaningful daily flexibility. Versus the AXA Newton Pro 100 the Trelock is slightly cheaper and 10 cm longer with comparable mechanical resistance; versus the ABUS CityChain 1010 you clearly give up robustness but save 25 euros and 1.1 kg. For insurance purposes all three are ART-2 and thus formally equivalent for Univé, ENRA and Centraal Beheer on e-bikes up to 3,000 euros.

Honest limits: Trelock has less brand presence in the Netherlands than AXA or ABUS, which mostly matters for key replacement — handled through the German webshop or dealer with roughly 10 days of shipping. The keys are thin alloy and feel less substantial than ABUS keys. And professional theft rings, particularly those active around Amsterdam Centraal and Utrecht Centraal, know that a Trelock sits at the lower end of ART-2 mechanically — for expensive e-bikes in those specific risk zones an ABUS CityChain 1010 or even a full ART-3 lock is the smarter extra spend.