Kryptonite New York Standard Bike U-Lock, Heavy Duty Anti-Theft, 16mm Shackle with Mounting Bracket and Keys, Ultimate Security for Bicycles E-Bikes Scooters

I feel that my bike is super secure. This thing is heavy duty. It’s known far and wide to be a really good luck and when I went to lock my bike up my E bike that cost a lot of money I noticed that the bike right next to my bike had the same brand it was a lot older model, but it looked just as tough back then.

This is the most Kryptonite of Kryptonite locks, thick, strong, difficult to pick or cut through. Not impossible to defeat, used correctly, but about the best you'll get. Also, because of that: very heavy.What I don't like is the frame mount. No matter how it's mounted or adjusted, the mount (& lock) slides and pivots, often into the way of your pedaling, and with the size of the lock and the way the lock fits into the mount makes it difficult to impossible to mount out of the way (e.g., in the seat/cross/down post triangle).

Much heavier than you think. Yes the seller did list the weight, but in practice it feels much heavier. The additional weight is more than worth it if they're as difficult to break as advertised

Minus 1 star due to the mounting accessory included. The lock is great but difficult to mount on a bike with front and rear derailleurs. The first bump I rode over twisted the mount. I find the lock is best just looped through your saddle to make it simple to carry.

Pretty heavy and strong lock

Goog as always

The lock is sized perfectly to properly secure my bike. It is very durable and the design is universal. I highly recommend this lock.

Superb Lock