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

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

Good lock, but living is a high thief area, I choose a different, what I feel was better for my purpose

I loved this bike lock for the 6 months I used it. I made a mistake under stress and the lock ended up falling from 2.5 feet onto concrete, which caused it to basically shatter. I tried snapping it back in place but the key wouldnt lock anymore. There goes $120.

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.

Love this lock, dont love the price. However, its the same price on Amazon than pretty much everywhere else..

Heavy and doesnt come with a holder to secure it to the frame while riding, so its kinda pointless. Its a sturdy, quality lock, but not easy to transport around with you. Really needs to come with a mounting bracket.

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

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.

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.

By and far probably the best lock out there. BUT, the key is starting to be sketchy, after a year or so. Im worried one of these days itll just get stuck completely and my bike will be trapped.