Kryptonite Evolution Mini-9 Bike U-Lock, Heavy Duty Anti-Theft Sold Secure Gold Bicycle U Lock, 14mm Shackle with Mounting Bracket and Keys, High Security Lock for E-Bike Scooter Road Mountain Bikes

It's big and heavy and my bike shop says it should be enough to deter any thief, especially since bike is obviously not brand new and not extraordinarily expensive.

This is perfect for my bike.This is the second one.I lost the keys to the last one.My fault for not storing the information to get another set of keys.These are not cheap. I think they're the best for prevention and security.

what you want from a lock although it's a bit heavy if you care about the weight

Works great and appears to be difficult to cut. Operationally sound. I've experienced no attempts to cut or steal my e-bike. Get the long u-lock. You need enough to go around larger posts and frames.

Length and weight is what I expected. Getting the hang of the key-locking mechanism takes about 2 months of regular use to get the hang of. Too many times I was fiddling with it for about 1-2 minutes trying to get it to unlock.

For starters, this lock is tested for a gold security rating, which is critical if you have a valuable bike and if you were to park it in an urban area.Moving onto the quality, the entire lock is covered with high-quality rubber, and all moving parts is well designed and calibrated. The lock mechanism is smooth and feels premium.The lock is longer than conventional U locks, which is useful when u have an E-bike. It also has a good amount of weight to provide with you extra reassurance.Finally, the mountain mechanism is a little bit tricky to get on. I consider myself skillful with my hands, and yet it took me about 10 minutes to install. This might be a dealbreaker for you if you’re not confident in your engineering skills.Overall, I strongly recommend this product and you can always give the mounting hardware a try before you skip the next product.

This Lock works like any other typical U-lock. It has a double bolt design feature so if someone wanted to cut through the lock with an angle grinder, they would have to cut through both sides however I don't think it offers enough value for the money, as there as this lock can be easily cut with an angle grinder within a few minutes according to tests that have been done. The size is long enough to allow you to lock up a bike or scooter to a variety of bike racks and it doesn't weigh as much as some of the other locks in its price range. There's also not a lot needed for installation. The specific lock I received appeared to have been used so I had to return it therefore I cannot say much about the lock functionality.

This lock is long enough to fit the fat bike post at his school. Recommended.