Kryptonite002178 New York Fahgettaboudit Mini U-Lock, Yellow

Heavy duty lock that is best used on your bicycle frame. Bolt cutters are not enough to get through this lock and a portable angle grinder would be required to defeat it. No single lock will stop thieves from trying to take other parts from your bicycle, so it's important to also get some slightly less heavy duty locks for your front and back wheels. These locks need servicing every other month and chain lube works well for that.

Bloomin Brilliant lock was attacked by an angle grinding thief muppet only damaged the outer surface after 5 mins . Still have my £2000 ebike . Only grumble is it's a pretty small D-Lock and it's quite heavy but definitely worth every penny .

Bought new bike insurance company sad to use this lock

I haven’t used this lock yet so will give a proper review in the near future. However as it stands it has a very thick 18mm shackle , it’s going to take some would be thieves a while unless they’ve come with a large industrial grinder, I have a second kryptonite lock although it’s a gold secure and a 110dcb bike alarm, I will park my bike within earshot so hopefully that will deter thieves long enough until I can get to the bike.

Unfortunately, with security products, you often only know how secure it really is when it doesn't work.So, I got this for my new ebike, as the insurance required SoldSecure Gold or better, so I decided to go for Diamond, and got this.It's very solid. The downside to that us that it is VERY heavy. Thankfully, I usually ride with panniers, so it can go in there.The lock isn't very big, but it's big enough to go around the bike frame and a bike rack or fence pole. You can't put it through the wheels as well, so I've got a lock cable for that. That means it's relatively easy to pinch a wheel, but not the bike.I don't reckon you could get through this without a noisy angle grinder, which would hopefully be a bit suspicious if the bike's parked in a busy area.My bike hasn't been stolen yet, so that's a good thing

On the most notable occasion, I got back to my bike and saw people trying to use an angle grinder on it. Someone else nearby told me they'd been trying to get through the bike lock for about 10 minutes and they'd already phoned the police. This was in clear view of CCTV, with all of them looking directly at the camera with nothing covering their faces, and there were many witnesses being outside an open Tesco, so of course the police did nothing.It survived 10 minutes on an angle grinder.Admittedly it can't fit through my spokes and frame so I have to just lock up the frame itself, so I combine it with 2 Keeper locks, one on each wheel holding both to the rack as well. It loses out on ease of use points for that as the sheer bulk makes it difficult to find a rack I can use in a very anti-cycling county.Another thing the weight affects: my poor bloody shoulders. This thing weighs a ton! But if it means my bike will still be there when I get back to it, I say it's worth it.If, as I do, you live in a county in which bike theft is not just common, it's normal and to be expected, to the point where the police themselves have been known to steal bikes, and especially if you tend to lock up a bike and go out of sight for more than half an hour, I'd say absolutely get this lock. If the only times you stop are a quick stop somewhere you can still see your bike at all times, get something MUCH lighter, your shoulders will love you.Oh, and use the damn bike path, PAUL. It's perfectly usable and always empty, and you know it is.

I recently had the experience of using a Kryptonite lock and felt compelled to share my thoughts on its performance and the customer service I received. The lock itself boasts impressive sturdiness, instilling confidence that it would be a formidable challenge for any attempt at cutting through. This level of security was a major plus for me.However, after three years of consistent use, I encountered an issue with the lock mechanism – it failed. Initially, this was a source of disappointment, considering the otherwise excellent performance of the lock. But what happened next truly set Kryptonite apart.Upon contacting Kryptonite regarding this issue, their response was swift and commendable. They didn't just address the problem; they went above and beyond by promptly sending a brand new replacement lock. This level of customer service was not only unexpected but also deeply appreciated. It's rare to find a company that stands so firmly behind their product, and this experience has only reinforced my trust in Kryptonite.In conclusion, considering both the quality of the lock and the exceptional customer service provided, I would gladly rate this product beyond the conventional 5 stars if possible. It's not just a purchase; it's an investment in security backed by a company that truly values its customers.

Very good