– Kohlburg Security Chain Lock 125 cm Long with 8.3 mm Thick 4-Edge Chain Made of Hardened Special Steel - Secure Bicycle Lock with 4 Keys for E-Bike Bicycle and Motorcycle

I recently purchased this chain lock with Sold Secure Gold certification, and I couldn’t be happier with my choice. At 120 cm long, it’s the perfect length to lock both the bike frame and rear wheel securely to a bike rack or railing. This gives me peace of mind, especially when leaving my bike in high-risk areas. Yes, it’s a bit over 2 kg, so it’s on the heavier side, but that’s a small trade-off for the serious protection it offers. The weight actually feels reassuring—it’s clear this lock is built to withstand serious attempts at theft. The chain links and lock mechanism exude quality, and you can tell a lot of thought went into its design. 5-star recommendation from my side.

Solid bit of kit. Won’t stop a determined thief but might make them consider an ‘easier’ target

I was looking for a sturdy lock I can wear as I need to be on and off the bike quickly when couriering. I've tried other wearable locks, but they were quite fiddly if you needed to them at peace in quick succession. This isn't advertised as a wearable lock, and at 2.5kg it's not the most comfortable to wear but if speed is your object this is a good lock. Heavey but much more versatile than a D Lock

This company has fantastic customer service, the product is really good, my feed back would be for longevity add a small rubber cover on the key hole to prevent dirt, debris and water entering but other than that, really good.

Exactly as described Trusted make Works perfectly Quality product

Great lock but need to oil the conacter in bad weather don't leave in wet found it out nearly cudnt unlock it got water in side otherwise great product and quality security

The requirement was for a motorbike lock that hit that magical sweetspot between being not too heavy, not too flimsy, looks tough and ideally, is tough. Well i watched about 34 YouTube videos of people cutting through chains to come to the conclusion that nothing is safe. So I 'rested' the idea of lightweight security in favour of (relatively) lightweight deterrent. At the end of the day, I want to make my motorbike look a bit harder to steal than that one over there. This does the job (so far). Can go in a tank bag, looks the part and actually does feel that it might stop a scrote with a battery grinder.... for at least 30 seconds, which to be fair is about as good as it gets unless you want to spend megabucks, or tow a trailer full of chain.

There is no doubting the solidity of the chain. It's a heavy piece of kit. The issue that might just be a matter of getting used to how slack the locking mechanism is. It can swing shut before the link is inserted. The other issue is that the key slips out of the keyhole quite easily. The weight of a keyring is enough to pull it out. Minor niggles as long as the bike is always there when I come back to where I left it.