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

I used Krytonite locks in the past, but after using this lock, I dont think Ill ever go back. Its strong but light enough to carry in a messenger bag without issue. Locking/unlocking is super smooth unlike my Kryptonite locks that would leave my fingers in pain. Cant praise this lock enough.

This lock feels indestructible, but the key is now permanently stuck in the lock with my bike locked to a rack. ABUS will not replace the lock unless I return it to dealer where I bought it for inspection. That dealer was Amazon, and the return window is long gone. I can ship the lock to ABUS to have them inspect it and determine if a replacement is warranted, but its stuck on my bike/bike rack and even if I could get it off I would be without a lock for a few weeks. I recommend going with Kryptonite bike locks instead, as I have one of those that I purchased in 2005 that still works great 15 years later.

Good lock, saved me a long trip to the bike shop to buy.

Awesome lock, my bike has not been stolen so far.

Im using this with an Abus Cobra Loop Cable. I do live in a large city while a fairly high rate of bicycle theft, and so far my bike has not been stolen, so I guess its working. Though Im sure if someone really wanted my bike, they could get through it. Just note that this lock is pretty heavy and large. I wasnt able to find a good spot on my bike to mount it to. Also note that this does NOT come with a mount. I had to order one separately from overseas at the time, but then of course I ended up not using it. There is a bundle that comes with a mount, so if thats what you need, look for the bundle instead.

This is a very solid lock and very heavy but it lasted only one time and the lock got unrepairable stuck thank god we were;t out riding as getting this off at a bike stand would have been quite challenging. I heard great things about ABUS but for the price this was a major disappointment.

I like the apparent sturdiness of the lock. Feels like it would take some time to grind thru it. Bolt cutter might not be a good tool to use on it. The tradeoff is that it is a bit heavy. Not an issue for me, but some might not like it.

I think its better than the Kryptonite Brand, its very sturdy and stiff, with easy unlocking/locking using the key. No problems after over a month of use.

This lock has a reputation for two things: security and expensiveness. Security alone does not justify the price to protect my $400 bike. I bought it for me, not the bike thieves. I have to carry and operate it. Its light, and it locks and unlocks sooo smoothly. Its the bike lock that makes me feel...pampered. No, I do not sleep with it.

Very good is perfect security