Kryptonite Evolution Series 4 U Lock, 4" X 9" Reviews
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Kryptonite Evolution Series 4 U Lock, 4" X 9"

1 ratings (1 Epinions review)
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Big Orange

Sep 23, 2008 (Updated Nov 15, 2009)
Review by  
Rated a Very Helpful Review

Pros:Strong

Cons:Hard to put back into the bracket, and really hard to remove. See UPDATE.

The Bottom Line: It's great, but a pain to remove from the mounting bracket. See UPDATE.


I had to buy a new lock because I picked my old Bike Guard U-lock with the barrel of a Bic Stic pen, and it worked, but it broke the lock at the same time! I decided to get a Kryptonite lock because I didn't want another Bike Guard (although I know Kryptonite did have the same problem) and that was the only other brand at the bike shop.

The lock is great. It has a bright orange base, it's heavy, strong and has a dust guard for the keyhole. Three keys are included, one of them has a built in light. It's a blue LED, so it's not as bright as a key flashlight, but it's good enough. The key is bulky though, but I carry it because I don't have a flashlight on me, and this will do.

The mounting bracket is the worst part of this product. It's tough putting the lock into it, and it's really hard to take it out. You have to hold the button while you pull it out, and the fit is so tight. Does anyone else have this problem? The same style goes for the higher-end New York locks. If you have the same problem, please leave a comment!

The installation of the mounting bracket was ok. It took me almost three hours to install myself. It does include the 3mm hex key. It can be rotated 90 degrees, although I don't see how that would be a good way to mount it. I had to get someone to help me pull out the slide wrap-around when I pushed it in too much.

You can forget about the anti-theft that covers over $2000. I read the rules once and said "fahgettaboudit". There are so many requirements that it's not worth the time and effort. You also need to send in the remnants of the broken lock. Oh, and it only covers ONE year. You'll have to pay extra for 2 or 3 years.

Registration for the lock key is good. It's done for free online. If you lose your keys, you'll get free replacement of your keys (only the first time).

UPDATE: A few weeks after I bought it, I couldn't open the lock with the key. The key went in, but it couldn't turn. I couldn't believe it. Luckily I wasn't far from home and walked back. I was so worried I either had to call a locksmith or the city to break the lock. I went back the next day and gave it one more try to open it. After almost 20 minutes, it worked.

I went back to the store to exchange it. I tested it before giving it to them, and it couldn't open. What do you know, I show it to the store, and they open it on the first try. They probably didn't believe me, but they still let me exchange it.

So the new one was easy to remove from the bracket. So obviously that was a problem with the first one. And it opens with the key. So after a few months, and I couldn't exchange it, the same problem. I couldn't turn the key to open the lock. But after trying for almost half an hour, it turns. I retest, and it seems to work. At that time, I rarely bike anymore. So I haven't tried if for awhile, but the fact that that happened, really diassapointed me. That's just not acceptable for a lock.


Recommend this product? No


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