Kryptonite KryptoLok Combo Bike U-Lock Standard, Anti-Theft Security Bicycle Lock Sold Secure Gold, 12.7mm Steel Shackle, 4-Digit Resettable Combination U Lock for Scooter Road Mountain Bikes

Excellent security product for my new ebike, especially when used with a Kryptonite cable (various lengths - mine is 1.20m). It is rather heavy, but my in opinion, reassuringly so.

Excellent combination lock. I use it when cycling to the gym. Doesn't feel too heavy in a backpack.

bracket is good if you wanna install it on lamp post only. It has only belt tape, so cannot be installed stable on bike. Then I've drilled though my bike frame and tried stable install it, but it has just one bolt hole which cutting even hardened bolt when driving. Get it if you wanna keep it in backpack, but do not install on your bike

Excellent for my needs

step-through bike necessitated putting mounts on side of downrod; works just fine, no interference with peddling. easy to lock up, easy to unlock. would buy it again

Seems like a reasonable lock. However, the instructions were poor. There was a Qr code to register the lock and no instructions or Qr code to tell me how to attach the lock to the bike or reset. After quite a bit of hunting through different advice and videos I eventually found some advice on the internet that helped. It is a basic courtesy to at least point customers at the appropriate instructions. The video of how to attach the lock that I found is quite straight forward however, the lock is too big to fit in the frame with a water bottle holder. Worth checking if you want to attach the lock to the bike. I will just put in my rucksack.

Someone (possibly someone I'd given the combination to) managed to open it and change the lock combination. I had to cut the lock off and throw it away. I now have a high-security lock with a key.

Grossartige Räder des Zahlenschlosses, sehr robuster Eindruck

Ottima scelta, non esiste altro lucchetto ad U con combinazione con questo livello di sicurezza, io mi affido sempre a questo con giusto prezzo /qualita’

Great lock

Buen peso y cierran bien, sin ningún tipo de juego en el candado

Perfect for putting on my guest bikes as I don't need to give my guests a key, just a 4 digit combo that somehow they still can't remember so they have to message me to ask me for the number again. But better than losing a key. Lock is heavy and as good as any keyed loc of similar weight.