Security Chain Lock [Sold Secure Gold] – 4ft Long Bike Chain with 4 Keys – Heavy Duty Bike Lock 0.33" – for Bicycle Ebike & Motorcycle – Motorbike & Scooter Anti Theft

This bike lock is very good! As somebody who's new to the whole bike world, finding a lock and what would prevent theft was pretty difficult.One thing to understand if you're in the same boat I was, don't buy cheap locks. Don't buy weak locks either! Chain locks are probably one of the best you can get, unless you plan on getting those anti-angle grinder locks that cost easily half the price of your bike, these heavy-duty chain locks work very well!It's less about how easy it is to break into, but rather how good of a deterrent it can be. When a thief is carrying around some bolt cutters, he's going to be looking for the easiest lock to cut through. He won't spend 4+ minutes gnawing away at your 0.33" chain lock just to get your bike, especially at the risk of getting the police called on him. If you live in a busy city like Chicago, New York, or London, you're definitely gonna need some more serious security.For me, this lock is perfect. I use my bike to commute around my city. I live in a populated area that has a decent amount of crime, just outside of Detroit, sort of known for theft. I leave my bike outside the gym (nobody wants to steal a bike from a gym, let's be honest) for about an hour, and it's completely fine. I'll go shopping at my local grocery store for about 15 minutes and it's completely fine.If you're in a similar situation to me, a city (decently small, but larger than 50,000 people) and has a reputation for theft, then this is a totally perfect bike. BUT! By no means is this secure enough to use to leave outdoors for more than 3 hours, especially overnight. In that time, any guy can run back home, grab his angle grinder and a few blades, and get through this lock in probably 3-4 minutes. If you absolutely NEED an overnight lock, I suggest getting some that are made out of anti-angle grinder materials. They'll run you $250+, but will make it worth your while, as it'll gnaw away at the perp's saw blade before it'll gnaw away at the lock itself. Either this, or you can get one that plays a loud alarm when moved.Now, one of my only complaints about the lock is the plastic housing on it. The part that holds the locking mechanism is a cheap sort of plastic that will chip away every time that it hits the pavement. And, if you're clumsy like I am, you're bound to drop this thing on pavement hundreds of times. Even just dragging it against the pavement is going to make it look like it escaped a tiger's den! This isn't that big of a deal as you can just be more careful with it, and so far it hasn't brought any issues as far as I'm aware.

Heavy which is to be expected. Quick to lock and unlock. I feel confident when leaving the bikes for a short lunch or run into a local store. If we are going to be out of sight or longer we use 4 layers of defense. One of these chain locks on each bike, a U shaped lock for each and then cable the two bikes together. The fourth is a loud alarm with the sensitivity dialed back to avoid false alarms. The hope is someone else’s bike looks easier to take or it requires more than tin snips the cut away all the junk.

As others have mentioned, this is a hefty lock! It’s heavy and pricey and the locking mechanism doesn’t always turn without some wiggling, jiggling, cajoling, and occasionally threats. I never struggle to unlock it, but the rubber creeps up the chain section and makes getting it locked the very last straw if you happen to be running late.That said, I very much still have the bike for which I use this lock and I have always been able to find places to park it because the lock is so versatile. Bike racks, trees, pipes, sign posts, hub cap spokes, a sleeping camel - this chain can wrap around just about anything if it stays stationary long enough and still have your bike waiting there for you when you get back.

So far my bike has not been stolen and this heavy chain lock looks formidable. BUT, it takes a lot of jiggling to lock it. Additional lubrication helps, but is not sufficient. I worry that the lock won't lock when needed. Unlocking can require a bit of jiggling, but locking is the problem. Have to repeatedly reset the link and jiggle the key; often the catch closes by itself while trying to get the link in.I would probably not buy this again, but too much hassle to replace it.

This product is one of the better chain locks out there, and there is a good amount of length so that you can attach it to most things. The only downside is that it is a bit heavy, although that's probably due to the strength and quality of the chain.I've watched videos of people cutting through this and it takes several minutes and also a replacement blade to do so, as the first one would become dull trying to cut through it. Therefore this lock would make it exceedingly difficult for any thief to get through, especially in a public place where there are other people around...Overall this one get's the job done!

I had used a cable lock previously but learned how easy they are to cut. This chain is beafier than the cable lock and should be able to slow up a thief. At 5 lbs. I can still carry it in my bag on the rack of my electric bike. Now I use this heavier chain lock along with my cable lock for the front wheel.

Have been using this lock for a bit over a year now. I live in a small city and have not had any issues using this as my primary lock for an E-bike though I also use a folding lock as a secondary/helmet lock and have a motion sensor alarm. I do believe this thick, heavy chain is a deterrent and would tend to make someone who is inclined to steal a bike look for an easier score. Just be careful not to drop the lock with the key in it as the weight of this chain hitting concrete can cause the key to bend.

Chain is a little on the heavy side but it is worth every penny. I able to lock up two bikes with ease.