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


List Price: $26.45
Price: $19.99 & FREE Shipping on orders over $35. Details
You Save: $6.46 (24%)
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Ships from and sold by Amazon.com. Gift-wrap available.
  • 4-Inch x 8-Inch
24 new from $16.99 1 used from $22.00

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Frequently Bought Together

Kryptonite Keeper 12 Standard Bicycle U-Lock with Bracket Bicycle U-Lock (4-Inch x 8-Inch) + Schwinn Thrasher Adult Micro Bicycle black/grey Helmet (Adult)
Price for both: $39.98

Buy the selected items together



Product Description

Kryptonite Keeper U-Locks feature a hardened steel shackle that resists hand tools for security in low crime areas.
  • 12mm hardened steel shackle resists hand tools
  • Reinforced collar over keyway for increased protection
  • High security disc-style cylinder
  • Includes click style transportation bracket
  • 2 keys - high security, disc-style
  • Protective vinyl covering
  • High security "Bent Foot" design
Item Specifications
Lock Size4" x 9"
Bracket Incudedyes

Product Details

  • Product Dimensions: 12 x 7.5 x 2.2 inches ; 3.5 ounces
  • Shipping Weight: 5 pounds (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B000BL1P3O
  • Item model number: 134962
  • Average Customer Review: 3.4 out of 5 stars  See all reviews (251 customer reviews)
  • Amazon Best Sellers Rank: #1,493 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
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Customer Questions & Answers

Customer Reviews

3.4 out of 5 stars
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Most Helpful Customer Reviews

51 of 53 people found the following review helpful By Kerry on September 9, 2012
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.
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49 of 53 people found the following review helpful By MLC on September 14, 2010
Verified Purchase
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.
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67 of 75 people found the following review helpful By Boone Helm on December 11, 2007
Verified Purchase
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.
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19 of 21 people found the following review helpful By Fluteytunes on March 28, 2010
Pros: Lightweight. Large enough for two bikes. Decent bracket.
Con: I often have to fight to get the lock open.
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96 of 123 people found the following review helpful By okspeck on January 23, 2011
Verified Purchase
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
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15 of 18 people found the following review helpful By USC Trojan on January 25, 2013
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.
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7 of 8 people found the following review helpful By J. A. Filippazzo on September 12, 2011
Verified Purchase
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!
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21 of 28 people found the following review helpful By m on September 3, 2010
Verified Purchase
the clamp is on the wrong side. this item is flawed. I have to send it back. waste of time. waste of money.
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