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

I was very impressed when I got this. It feels incredibly solid. A word of caution to consumers, its heavier than you think it is. Also, do yourself a favor and buy the one with USH connector. I got mine mounted on with 3 Velcro strap in the frame of my bike.

Awesome - lock No lock is 100% - but this lock has been great I park my bike frequently in high traffic shopping areas - it has been tampered with; but holding up great

I picked this bike lock because it hits a lot of great selling points (more info below). I wanted something better to protect my bike while I go into shops or restaurants. I exclusively commute on my bike, so Im forced to leave my bike outside and in the open. This lock gives me the peace of mind that nobody will take my bike while Im away. The lock works very smoothly and I have never had a hangup with the key. The coating does an excellent job at protecting the paint on my bike (no scratches!). It is quite heavy, but its high quality stretched steel. The lock mount is oddly shaped and can be difficult to find a place to mount it onto. I keep the lock in my backpack or satchel instead. Pros: -Hardened, stretched steel -Double bolted square shaped locks -Smooth working lock -Protective rubber coating -Medium shackle length -Two keys, one comes with a light -Replacement keys are easy to get from ABUS Cons: -Its heavy -Mount is tricky to use Here are some specifics: It can resist ~13 tons of cutting force, ~7 tons of pulling force, and 1,300 Nm of twisting force. It uses a double-bolted square shackle. The square-in-square shape prevents twisting. That doubles the locking force as well as resistance against tools.

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

I had received the U Lock in a poor condition (i.e., it was scratched on the front, refer to picture) a couple days ago. I thought that it would be fine enough to use anyway because I thought the damage was surface-level, and I needed immediate use. However, I have only used it once, and it is currently still locked to an outdoor bike rack because the lock is sticky after one rain storm. The lock will not turn when the key is inserted. I have tried both WD-40 and Tri-Flow multiple times, yet the lock still does not catch. Im at a loss of what my next move should be and am highly disappointed because of the U Lock price and supposed quality...that is, this lock should NOT have stuck after one short rain storm.

It may be expensive, but so far totally worth it. Locks and unlocks like butter. Very sturdy. The holder it comes with to attach it to your bike frame is an awesome addition

Someone tried to use a lifting jack to take my bike! But, this locked still held strong! Thanks to this lock, I still have my bike!

I dont know what is going on with Amazon these days, QC is in the toilet. Seems like 30% or more of my purchases need to be returned, either because they are more than lightly used, damaged, or just poor quality. I got this lock and it was obviously used, and quite damaged. I returned it immediately, of course, and ended up buying one (for full retail, quite a bit more expensive, like an extra $75) at a local bike shop, which carried Abus, but had to order this model. I guess I could have reordered one and hoped it worked out the second time, but I lost patience. The lock itself is great, probably the best U-lock made, period, but certainly the best at this weight. No bolt cutter is going to get through this thing. Of course, thieves in big cities use angle grinders, which will cut through this, but at least it will take a few minutes and make a bunch of noise. I would give 5 stars for the lock, and 1 star for the terrible amazon experience - and I am getting so sick of getting used and damaged stuff, or the wrong product from amazon I have started looking for stuff at brick and mortar stores again, and would rather pay the premium then have to keep returning things to Amazon, or trying to fix things myself. On-Guard makes great locks also, and Kryptonite makes one equal to this (but thicker - 14mm vs 13mm - and heavier, though a bit less expensive) as well as the NY line, which is even tougher, but at 16mm, very, very heavy. I also have an Abus 9mm hardened steel chain lock, which I really like. I use either the chain or the U-lock with a cable to secure the other wheel (although cables are easy to cut, seems hardly worth it to a thief just for a wheel set, but I guess on a slow day, they will do it).

Bike mount is NOT included in price!! Costs an extra ~25usd.

Far heavier than expected. Wont fit ladies Trek hybrid when trying to lock bike to small diameter bike rack.