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

Very sturdy, very heavy and well made. Im using in conjunction with the Abus Bordo GRANIT X plus link lock. Mainly because its an electric folding bike with high price tag and I need to protect the front electric motor wheel and the rear internal geared hub. Im pretty confident these will do the job.

I just simply love it. Great product, lovely seller

Heavy, but very Secure

Solid. Definite deterrent. Big enough to get around bike parts

Very good is perfect security

I bought an extra set of keys and carry 2 keys on me at all times.

Just what I wanted,

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.

Lock has been working great for over a year.

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).