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

Very good is perfect security

It works great, I use a Velcro tie down strap, to help hold it, and keep it from rattling,

This little dude is tough! Hard steel, both sides lock, cant drill the locking mechanism, and fits around the rear tire/frame with full suspension bikes. Still need a chain for the front wheel and the post your locking it to but this lock is on to stay.

So I guess this is a testament to this lock that the thieves who stole my bike last week had to unbolt the large steel bike rack from the concrete and take bike, lock and rack with them to get away.

This Abus Granit XPlus 540 lock was purchased for my using two U-locks together in high theft areas of town. The other U-lock is a 7 Kryptonite Evolution. This way, if a thief learns to pick one brand of U-lock by watching the youTube vids on lock picking hell be deterred by a lock from a different mfg. Since both locks are double-locking, 4 cuts must be made with bolt cutters on the two locks as opposed to 2 cuts on a single lock shackle (or just 1 cut if youre using a Kryptonite bent foot U-lock). Otherwise I use just the Abus in better areas of town. And using two locks will persuade a thief to move elsewhere instead of trying to pick open your lock with whatever metal implement he uses, damaging the locks internal mechanism. He may be unsuccessful at opening the lock but when you try to unlock it you may not be able to. The black & dark gray Abus looks great mounted in the bracket, better than a bright orange or yellow U-lock would look. Even the shackle is a 2-tone gray and black which enhances the appearance. And its the only lock with a 13mm shackle given a three star security rating by ART. Weight is 3.27 pounds - light for a 9, 13mm shackle lock. Made in Germany. The Abus comes with one of two different mounts for frames having round tubes: the EaZy KF bracket (for 28-36mm diameter tubes) or the oversized USH 540 bracket (for 15-35mm tubes). Mine came with the EaZy KF bracket which is simple to install and use. One thing not mentioned in the instructions is that by removing the plastic clamp from the shackle, rotating it 90 degrees, and re-installing it onto the shackle, the lock can be positioned in the EaZy KF bracket so its exactly in the middle of bikes frame [pic] where it wont bump a leg. The mounting bracket for my Kryptonite Evolution U-lock seems less sturdy and is somewhat difficult to install onto bike frame to the point where I never used it, instead carrying the Kryptonite in a backpack. If you want the EaZy KF mounting bracket as opposed to the USH 540 bracket, look closely in the upper left corner of the cardboard wrapper the lock comes in for a small picture of a hand inserting a U-lock into the bracket with the word click in the picture. This lock will come with the EaZy KF bracket. And dont tighten the bracket too much if your frame is alum or carbon. I give the Abus 4 stars not 5 because its expensive and the seam that runs circumferentially between the 2 gray plastic covers on the metal crossbar may tempt a thief to pry apart the plastic, thinking this might help break open the lock. It wont open the lock but with the plastic covering damaged or gone the exposed metal crossbar will be prone to rust and the lock will have a damaged appearance. By comparison, the plastic covering on a Kryptonite crossbar is a seamless skin that wont give anyone the idea to remove it. But locks should be seen as only deterrents to theft and not actual protection against it since a battery-operated angle grinder will cut through any lock shackle (although this will make a lot of noise). The best way to protect an expensive bike is to have a second $200-$300 bike for riding & locking around town and only ride the good bike when it will not be parked out of sight. Btw, in the online Cyclist review of bike locks an angle grinder cut open the Abus Granit XPlus 540s 13mm shackle in 2 minutes & 51 seconds - thats 17 seconds LONGER than it took the reviewers to cut open the thicker 16mm shackle of the Kryptonite New York (2 min & 34 seconds). This shows the hardness of the Granit 540 steel.

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

I finally got myself a new bike, and wanted a new lock in the vein of a Kryptonite U-Lock. I have two previous K-locks that never failed me, but then I tend not to lock up unsupervised in public for long. I like the feel of the ABUS; the key action is smooth and the mechanism feels well made and sturdy. I understand that any lock is the best until its defeated, but so far so good. My one complaint is that even though its the same size as my K-locks, because of the U-bar shape and layer of sealant, it doesnt readily fit in my back pockets like a K-lock. I ride with my U-locks in my back pocket for security and driver harassment deterrence, so now I need to make other arrangements to keep it handy while riding.

Very heavy

I did a lot of research on bike locks before choosing this one. This is one of the highest rated locks (of the other two, one weighs a ton and the other is almost $300). It was number one against lock picking and its extremely resistant to a grinder with a titanium blade in spite of its 16mm shackle. Never mind bolt cutters. Its designed to resist extreme torque as well. Its easy to mount and rests sturdy. No rattling. Besides its amazing strengths, its relatively light in weight. This is my main lock. Although, I obviously dont rely on only one lock. The other is its rival in the same category. The other weighs a ton, tough.

I use this to secure my bike at work... and it stays there... its heavy but thats what you pay for in security... seems to be holding up well.