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

Quality lock, but it is pretty heavy. Im using this as my commuter lock, and putting it in my backpack adds quite a bit of weight. However, good security comes at a price.

Lock looks sturdy, I would have given a 5 star, but the key that has the light did not have the battery holder or battery. I would have to send the lock back, it wasn’t worth the time to send it back. I am happy with the lock.

Very good is perfect security

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

Long enough for my scooter and a nearby post or rack. Beautiful mechanical sound when operated, makes me think of a bank vault door closing. Rubberized covering seems quite tough. Not terribly heavy but would make a fine defensive weapon should you happen to need one.

I researched the security level of many different locks. An expert who teaches lock picking and bypass mentioned Abus as one of the best brands to defeat such efforts. The only way to get into this lock is through brute Force. Im sure that is possible, but as long as I have a better lock than the guy next to me, most criminals will move on to an easier lock.

IMO the right combination of size and weight, but you’ll have to be against the bike rack to lock the frame to the rack. Barely fits inside my bike trunk, but worth it. I would recommend the locking dock attachment if you have space to store it within the frame.

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.

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).

Easy to use and mount to my bike. Definitely worth the investment to protect my bike from theft.