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Kryptonite Keeper 12 Standard Bicycle U-Lock with Bracket Bicycle U-Lock (4-Inch x 8-Inch)

3.4 out of 5 stars 317 customer reviews
| 3 answered questions

List Price: $26.45
Price: $22.60 & FREE Shipping on orders over $35. Details
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Frequently Bought Together

  • Kryptonite Keeper 12 Standard Bicycle U-Lock with Bracket Bicycle U-Lock (4-Inch x 8-Inch)
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  • BV Bicycle Light Set Super Bright 5 LED Headlight, 3 LED Taillight, Quick-Release
Total price: $31.59
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Technical Details


Product Description

Kryptonite Keeper U-Locks Item Specifications: Lock Size 4x9 Bracket

Product Details

  • Product Dimensions: 1 x 4 x 8 inches ; 3.5 ounces
  • Shipping Weight: 2.5 pounds (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B000BL1P3O
  • Item model number: 134962
  • Average Customer Review: 3.4 out of 5 stars  See all reviews (317 customer reviews)
  • Amazon Best Sellers Rank: #11,775 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

Customer Reviews

Top Customer Reviews

So I initially wrote: "The lock may be fine but the mounting bracket is terrible (unless I'm missing something... In which case please tell me). The silver part on the 'U' lock itself, which is supposed to slide into the black plastic mounting bracket, faces the wrong way. It's hard to describe but basically you can't clip the lock onto your bike and have sit (or hang) within that triangle made by the main bars/beams. Instead it sticks out and will get in the way of your peddling. Very annoying."

But I WAS missing something. You can use the Hex Wrench that comes with it to loosen and rotate the silver part (which I think is actually called the 'spline on the shackle'). So this lock mounting thing is not a problem. Go ahead and buy it. No extra tools or anything are required. I totally take back my bad review. I'm still only giving it 4 stars because they shouldn't sell it with the shackle tightened in a position that isn't useful to anyone.
2 Comments 61 of 64 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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The lock is good but on a scale of 1-12 (12 being safest) this lock rates at a 7. This is Kryptonite's scale, not mine. Since I live in a downtown, sea-side area, bikes get stolen all the time. I use this lock in addition to a thick cable lock. Between locking the bike frame to a solid object using this lock, I intertwine the cable lock (figure 8 style) through & around the frame and through and around the tires. In doing this, even if they break this lock, they still can't ride off AND, they can't steal my tires very easily.
Another suggestion... loose the quick release on your seat. It's hell having to stand and pedal if they steal your seat. Don't make it easy on them.
Comment 68 of 76 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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By MLC on September 14, 2010
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The tube is too thin to provide enough strength against using tools to cut off. My bike was stolen this evening in front of a crowded subway station, the lock got cut off completely. I won't recommend this lock to anyone who is going to park their bike in public space for more than 5 minutes.
3 Comments 57 of 67 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Pros: Lightweight. Large enough for two bikes. Decent bracket.
Con: I often have to fight to get the lock open.
Comment 22 of 25 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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I had the same problem that other reviewers had. I ordered the product anyway because I believed that Kryptonite makes good locks and stands behind their products. I just took it out of the package and noticed a major flaw. The fitting is attached to the opposite side of the lock as it is in the picture (above) and you cannot slide it into the clamp without hitting the bike frame. This is hard to describe but like others above me, I realized that it doesn't work. I thought that this was too stupid of a problem to be real, so I wracked my brain for about 20 minutes trying to figure out why I was so dumb and couldn't figure it out. Turns out, I'm not the one who's dumb--whoever assembled this attachment is! I guess we'll just carry the lock on our handlebars or in a backpack, but as far as attaching the lock to the frame.... FORGET IT! Thanks for reading
3 Comments 98 of 127 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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I guess they finally fixed the clamp problem, because I was able to use it the intended way. I only use the clamp when I don't have my backpack on me, so I can't speak for longevity. It does seem to be sturdy, though. The barrel turns freely when I operate the lock, given that you've inserted the key properly. No issues there. My model looks slightly different than the one pictured, and came with longer oval keys that have a solid feel to them. The lock itself is relatively heavy but that's to be expected. MUCH better than the Wally World locks. I feel confident leaving my bike alone with this lock, however, I do live in an area where bikes are not stolen that often, and I also never leave my bike for periods longer than 2-3 hours. You may want a stronger one if you live in a bigger city or leave your bike outside. ALWAYS ALWAYS ALWAYS pair a U-lock with a chain or wire lock with a separate padlock when leaving your bike for extended periods of time. I cannot begin to describe the way people at my university lock their bikes up. Despite having decent locks, they somehow manage to make it scream "PLEASE STEAL ME". Please don't be careless; you're the only one that will get burned from it. This lock is definitely worth the price. Very satisfied!
Comment 9 of 10 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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I left my back outside for a few days, and it rained and snowed. A few days later, I tried to open the lock and I managed to do it forcefully. However, the key is stuck in there and it's impossible to remove. It was never smooth to open to begin with.
1 Comment 10 of 11 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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On the package there is a sticker which says:

USA & CANADA
BICYCLE
$500
Anti-theft Offer* Registration Required

The foot note (*) is not to be found on the package and on the manual inside it says, that the anti-theft insurance is not included for free, but costs $10 extra.

Quality of the u lock might be good, but the customer information is irritating and wrong! Sorry.
Comment 22 of 28 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Kryptonite Keeper 12 Standard Bicycle U-Lock with Bracket Bicycle U-Lock (4-Inch x 8-Inch)
This item: Kryptonite Keeper 12 Standard Bicycle U-Lock with Bracket Bicycle U-Lock (4-Inch x 8-Inch)
Price: $22.60
Ships from and sold by Amazon.com
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