Kryptonite Evolution Long Shackle Bike U-Lock, Anti-Theft Security, 14mm Steel Shackle with Mounting Bracket and Keys, High Security for Bicycles Scooters,Black

Heavy, but does the job. I use 2 locks to make things more difficult for thieves.

Fits very nicely and with good distance. Nice strong lock.

I saw some negative reviews regarding "key/lock would not work". That happened to me, so I took closer look at the lock and noticed the one rubber ring that aligns the lock cartridge was out of place. When I aligned the rubber rings correctly, all was well. So first check the rubber ring alignment if having trouble.

Hello, battery powered angle grinder. But at least a lock like this slows them down a couple of minutes. The problem is the key/lock interface. It remains tricky to get the key to engage. Sometimes I can turn the key in the lock immediately. Other times it takes quite a bit of jiggling. This seems to be a Kryptonite thing. Annoying.

Men don't like to read directions, it's true. I'm guilty. When I read the directions, trusted the process, I understood how this thing mounted. At first I thought it was broken or just poor design. It's actually genius who it straps around a pole and clamps to it. It's been on my scooter for 6 months, takes lots of bumps, and hasn't come off.The lock itself -- what's there to say. Nobody is going to steel your ride when they see it. If so, they better come with some serious grinders and make a ton of noise.

UPDATE 5/30- Kryptonite asked for a pic of the damage, which I sent. They immediately shipped me a new lock and sent me a ups label to send the damaged one back. All during the Covid-Crazy! First rate service, nice to get that these days.UPDATE 5/15- Was tightening the spline screw with the supplied wrench and the screw stripped out. Later, on my first ride with it mounted, the spline loosened and the lock rotated in the mount and was rubbed by the back tire, damaging the finish on the shackle down to the metal. Submitted ticket, guess I'll see what they say.This is a beast of a lock. Heavy if that matters to you.Key and bolt operation is smooth as silk.Only con is the mount, I'm scared the lock is heavy enough to break it if I hit a curb or other sharp bump. Only time will tell. It would also be nice if the mount was designed to be moved, as it is when you cut the rubber and strap you're stuck with that size.But the lock itself is great, 5 stars!

I looked up that this is good for scooters and granted it is on the larger side, still had people that used it as such but not even one day using this my scooter gets stolen so I will not be using this in the future.

I bought this lock to protect my investment. Anyone who sees this lock on my scooter would think twice about stealing it. The lock is a better deterrent device than any others such as alarm because once it's lock to a permanent post the thief will need to jackhammer the post to take it, which gives me a great piece of mine when I park my scooter in public areas.