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

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).

Industry standard. Slightly better security than the other brand but not that much better for the higher price. I think they need to contact NASA to develop a material to resist diamond saws and high-leverage cutters. GPS locators and alarms probably would be better.

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.

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.

Get this if your bike is worth it

Very heavy duty

Great lock; my daughter has a girls bike and it didnt really have anywhere that we could mount the lock so she has to carry it in her backpack when shes riding. But it is very sturdy and we feel that it provides great protection for her bike (on a college campus). She uses this lock to secure the front wheel and frame to the post, but also uses a Kryptonite chain to lace through the rear tire (not as a secure, but faster than using 2 U-locks).

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.

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

Ive been a Kryptonite user for years, and I still am. I think they make great locks, very sturdy and intimidating in that they pose some difficulty to a thief, enough to be a deterrent. However, they dont perform well over time. They dont like being outside for long periods of time, which is understandable. They stick, and eventually it was taking me several minutes to get my yellow NY U-lock unlocked. No amount of maintenance would help. So I got this thing. Its great. It stays outside with my bike in all weather and it works. Silky smooth. And its just as strong if not stronger than the Kryptonite equivalent. I love it. Its expensive, but you might have to buy it only once if you only keep one bike outside.