ABUS  Granit X-Plus 540 9" U-Lock

Someone tried to break this lock when I left my bike parked--- looks like they tried freezing it and then using a hammer, while also trying to pick the lock. None of the attempts worked, and the lock was completely intact (except the keyhole was jammed in response to their tampering, though it still didn't open). This lock served its purpose and kept my bike safe.

Locks easily. I dropped the lock down some stairs, and the plastic cover came off, but the lock inside was undamaged. I just snapped the cover back on.

1) the mounting bracket is poorly conceived and does not fit snugly on any part of the hybrid bike frame. (Tried the frame, seat, back triangle). The lock is cumbersome and without a mounting bracket would be very impractical to carry in a bag. 2) the shackle seems vulnerable. While the Abus quality reputation gives comfort from lock pickers... There is too much slack when locking this behemoth lock through both bike frame plus rear tire to a pole - the gap just gives more room for a potential thief’s bolt cutters to get in there. Returned.

The mount is fine, it is a larger u-lock so it may not mount well on certain frames it is tough to design a mount for a highly secure lock that is going to be super universal. Yes it might be a bit harder to carry in a bag but I can assure you it is lighter and cheaper than a new bike. When you have the mount and it is able to work it is fantastic, doesn't move and holds the lock securely. If I need to carry the lock and don't want to use the mount or can't for some reason I will put it on top of my rack and bungee it down. I wouldn't want to commute without a rack and get my back all sweaty, gross! As far as length of shackle if you have extra shackle length you bought a lock that was too long and it is not a fault of the lock. However there are some times when you don't need the extra length and sometimes you do. Get a length that best fits your needs. I have the middle sized one it is excellent for most things and if I have so much extra which is rare I could lock up the front wheel in there as well and take up the slack.

This item looks strong, but truly isn't. I thought this U lock was sturdy and a good anti-theft deterrent given its weight and intimidating looks. Sadly, a thief cut this lock open and stole my e-bike attached to it. I would invest in another lock outside of this one. Learn from my loss!