Evolution 790 Folding Bike Lock, Compact Lightweight High Security Anti-Theft Foldable Bicycle Lock with 2 Keys and Mount for E-Bikes Scooter Road Mountain Bikes, 90cm (35 in) Orange

This is an excellent bike lock, which is apparent by Kryptonite's guarantee that if your bike gets stolen, they will replace it. Super durable lock that is apparent by the weight of it. It is a little expensive, but the peace of mind that it brings is worth it! I only wish the lock was a little longer as it can sometimes be tough to secure around both the bike and a rack.

Compact lock that makes you feel safe walking away from your bike. I have attached it to the boot on of my bike and forget it is there great design and easy to mount on any mounting holes.

This lock works great! I added this to my e-bike for out of sight security and it’s large enough to lock around 4” fat tires and a frame rail or pole. A nice mount is included and it’s literally a “snap” to use! Kriptonite makes premium locks and their reputation is certainly valid with locks like this one. Highly recommended 5⭐️

The lock seems very solid and strong and the holder is excellent; however, the lock has one annoyingly dumb (in my opinion) feature: there's a spring in the lock mechanism that forces you to hold the key in the turned position in order to unclasp the lock. You ideally need three hands to unclasp the lock: one to hold the lock head, a second to hold the key in the turned position, and a third to pull the end bar out of the lock head. Since I only have two hands, in practice I use one hand to hold the lock head, the other to hold the key in the turned position, and then I let the bar end fall out of the lock. Dumb. But to unclasp the lock to remove it when it's actually securing the bike to a rack, I have to employ an extra bit of dexterity to unclasp the lock. Dumber. I wonder if the comparable ABUS or Foldylock locks have this "feature." The lock has a sliding cover to protect the opening from the elements, but it's not automated: you need to remember to slide the cover over the keyhole. Update: The ABUS 6500 and the Foldylock don't have the annoying feature. However, the Kryptonite has one other very useful feature: both sides of the head where the links extend swivel, which gives this lock more flexibility than the others, which swivel only on one end. The ABUS is particularly ungainly.

This thing is a beast. I can't even begin to think about how a thief would get through it but I don't think it would be possible to do a snatch and grab. They'd probably have to spend quite a bit of time to cut through it with a powerful diamond circular saw. It does have limited reach and would be nearly impossible to lock up two bikes with it, but for one bike it is fantastic. I supplement it with a thick cable that I can loop through the front wheel as this cannot reach both wheels.

Attempt to register for the advertised anti-theft offer and read the fine print BEFORE purchase. The advertising and box make it look straight forward, it's not at all, it's a fine print scam. That was the only reason I got this heavy bulky giant lock instead of the smaller one, and now I'm stuck with it.

I could not have found a more perfect lock for my Segway GT scooter. The holder fits perfectly on the stem and is so secure that the lock does does not rattle. The simplicity of this lock to secure my scooter is amazing. On top of all this they guarantee this lock by providing 5 year theft insurance for $35 that will cover the cost of my high end scooter. Highly recommend this items.

After two months of daily use at Stanford University, a reputed hotbed of bike theft, I give this lock two thumbs up. Very easy to use, very easy to carry securely, and seems to be a serious deterrent to theft. (I also bought a year of bike lock insurance from Kryptonite.) My only qualm is that it's not very large (although perhaps as large as a standard U-lock), so your bike frame has to be quite close to the (necessarily small diameter) rack/post/tree in order to close the lock.