ABUS U-Lock Granit XPlus 540, Bike Lock with XPlus Cylinder, High Protection Against Theft, ABUS Security Level 15, Black/Grey

Excellent lock very sturdy and easy to use. I love the light so you can see the key hole. I would recommend this product.

It gives me the comfort to run into a store for a few minutes with my OneWheel mounted to my soft top Jeep.

This lock is SOLID, which is great for safety. The only reason I gave it 4 stars was because it is really heavy. We bought if for my son to lock his bike up at school and it was too heavy to put in his backpack. We ended up getting him a basket to store the lock in. The other thing he didnt like was that it is hard to lock the frame to the bike rack at his school because it obviously doesnt have the length of a cable lock. It can be a bit tricky to get it locked up but once you do, you can feel good knowing its secure.

Expensive, but what a great lock. The key engages and turns like butter (important to me after replacing two cheaper u-locks, in two years, that the keys finally couldnt turn any more from binding-up). Ive had this lock for a year, in Seattle weather, commuting at least five days a week without interruption (all seasons) and the lock appears to be weather proof. Its heavy, coming in at about 3-1/4 lbs. for the 9 and 3-3/4 lbs. for the longer 11 model (I own both). But when you weigh 250 lbs., and ride steel frames, its less than 1% difference relative to the cheaper, dead, discarded u-locks Ive had. If youre riding carbon, and are skinny, well, I cant imagine you would want this lock stealing back all the reduction in weight youre enjoying. This does not come with the frame mount, bought it separately (about $25). It, too, is excellent, no rattling, easy to remove and return to the mount. The locks square shackle, hopefully, means that anyone using a power cutting wheel would have to make two cuts, because the shackle does not twist in the lock like round shackles can. The shackle feels stiff/strong enough that a thief would be hard-pressed to bend the shackle after a single cut.

Strong and easy to use. I can now secure my bike with confidence that it will be there when I return.

Suddenly the key stopped working Luckily the bike wasn’t locked But lock components don’t move when key is turned

This thing just rocks on so many levels. I feel confident using it at almost any location

No lock is impossible to break, but this one comes pretty close while still being versatile. Its a good size to lock the back of my bike frame and wheel (including an electrical motor) to an adjacent rack. Also works to lock the front wheel to the frame. The key mechanism is still smooth after 1 year and a half even with exposure to rain. I use it along with another ABUS folding lock when I need a more flexible locking configuration, and my bike hasnt been stolen yet, so I guess its doing its job. If you ever need to order another key, its pretty hassle free using the given card. Allow for about 2 weeks shipping to US, so I would recommend replacing your spare immediately once youve burned through one.

This little dude is tough! Hard steel, both sides lock, cant drill the locking mechanism, and fits around the rear tire/frame with full suspension bikes. Still need a chain for the front wheel and the post your locking it to but this lock is on to stay.

Seems like a solid enough lock. The real test is to see if somebody opens it and steels my bike.