Bike U Lock Heavy Duty Bike Lock Bicycle U Lock, 16mm Shackle and 4ft/6ft Length Security Cable with Sturdy Mounting Bracket for Bicycle, Motorcycle and More

I tried to saw through mine and nothing is getting through. It just ripped the outer layer but it’s not touching the metal. It is a little heavy when I carry in my back pack but I love the security and lock functionality. It makes me feel my bike isn’t going anywhere. I also noticed it’s sun resistant because it didn’t burn my hands when in direct sunlight. It’s warm but not hot to touch.

We use this lock with a chain to lock our bikes to the car. The shackle is just the right size to slip through the 9mm chain links. The shackle is wide enough to fit around the bar on our car, or it can hook to the trailer hitch. It is easy to lock and unlock. I wish that it has more than two keys as I have seen similar locks with 3 or 4 keys. The lock seems to be quite sturdy. Hopefully it will never be cut, but only time will tell.

Everyone who rated this lock badly relied on the cable to keep their bike safe. Don't use the cable! I'm using this as a small U-lock for my OKG 12mm 4ft chain. The U-lock is pretty small but it works for my purpose of locking 2 chain ends together. It's pretty light for a 16mm lock so I would guess that it's not completely 16mm of steel, but it's a pretty good price.

I leave my bike outside for approximately 6 hours a day in public at a bike rack and this product has kept it from "disappearing."Pros:Gets the job done, thieves hate locksRubber keeps you from burning your hands when it's been in the sunRubber also is not fun to cut throughComes with 2 keysCons:Lock hole rusts easilyLock can get a bit stuck when turning requiring you to jiggle itIt's almost too short for some placesIt's also a bit too narrowIt's good for the price thoughOverall: 7/10

It did a great job in protecting my scooter, even though the thief still stole my headlight.

Real good lock and built for tough situation

this lock was exactly what I needed to secure my bike when I go to the grocery store, stop for lunch on ride, etc. it may not be sufficient for locking a bike every day, all day in the same location. the metal is vinyl coated, so it looks and feels good. Of course, you then can't see if there are any weaknesses in the material, but neither can a would-be thief. the key mechanism works very smoothly, the mounting bracket is well-designed, and it comes with 3 keys (so you can lose two before you panic). it has a covered cable lock too. the only negative is that the "U" is rather short, meaning that can't lock the frame and back tire together to a rack unless you use the cable. Overall, outstanding for the price.

The lock is functional and seems durable/heavy duty. It is on the smaller side which can be tricky depending on what you are wanting to lock your bike to. That hasn’t caused any issues for me yet.The problem I’ve run into is that I can’t find a good place to install it without it feeling in the way. The holder sticks out to the side of whatever you attach it to so the lock it constantly hitting or touching my leg regardless of where I put it. For that reason, I wouldn’t get this particular lock again.

I Brought this because there are lot of thieves in my area. THIS IS A WORTH BUYING PRODUCT! Check it out!

Very strong lock, much thicker than some others available and I daresay impossible to cut through. The lock isn't quite big enough to fit around the front wheel and frame, so I use the included cable for the front wheel which is a bit awkward to carry around and not quite long enough to reach the back wheel too. Minor niggles aside its a good quality lock that does what it says.

High-quality stuff, a little bit small but I had no problems with it, it's doing pretty good against the rain.

Rope part is quite weak. Broke within one month.Lock part have third class paint

Mounts well on bike for carrying. Only criticism would be shackle is a little short.