--- product_id: 98821665 title: "Keeper Bike U-Lock Standard with Braided Steel Cable, Heavy Duty Anti-Theft Bicycle U Lock, 12mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys | bike-locks" brand: "kryptonite" price: "€ 72.98" currency: EUR in_stock: true reviews_count: 13 category: "Kryptonite" url: https://www.desertcart.hr/products/98821665-keeper-bike-u-lock-standard-with-braided-steel-cable-heavy store_origin: HR region: Croatia --- # Ergonomic stainless steel keys 12mm hardened steel shackle Double deadbolt anti-rotation design Keeper Bike U-Lock Standard with Braided Steel Cable, Heavy Duty Anti-Theft Bicycle U Lock, 12mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys | bike-locks **Brand:** kryptonite **Price:** € 72.98 **Availability:** βœ… In Stock ## Summary > πŸ” Lock in peace of mind, ride with confidence! ## Quick Answers - **What is this?** Keeper Bike U-Lock Standard with Braided Steel Cable, Heavy Duty Anti-Theft Bicycle U Lock, 12mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys | bike-locks by kryptonite - **How much does it cost?** € 72.98 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/98821665-keeper-bike-u-lock-standard-with-braided-steel-cable-heavy) ## Best For - kryptonite enthusiasts ## Why This Product - Trusted kryptonite brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Key Confidence:** Ergonomic stainless steel keys reduce torque and prevent breakage - β€’ **Twist-Proof Locking:** Double deadbolt design locks both ends for maximum holding power - β€’ **Effortless Transport:** Snap-in mounting bracket for easy bike frame attachment on the go - β€’ **Unbreakable Security:** 12mm hardened steel shackle resists cutting and twisting attacks - β€’ **Versatile Protection:** Includes 4ft braided flex cable to secure wheels and accessories ## Overview The Kryptonite Keeper Bike U-Lock Standard combines a 12mm hardened steel shackle with a double deadbolt anti-rotation design to deliver heavy-duty theft resistance. It includes a 4-foot braided steel flex cable for securing wheels or accessories, ergonomic stainless steel keys designed to prevent bending, and a convenient snap-in mounting bracket for easy transport. Trusted by thousands with a 4.4-star rating and backed by a limited lifetime warranty, this lock offers professional-grade security for your bike. ## Description From the manufacturer Keeper 12 STD U-Lock with 4" Flex Moderate Security 12mm hardened performance steel shackle. Hardened Double Deadbolt design with Anti-Rotation to resist against twist attacks. Includes 2 stainless steel keys with ergonomic design to reduce the amount of torque and keep them from bending or breaking. Includes side mount snap-in bracket. Disc style cylinder with centre keyway. Dimensions: 4" x 8" (10.2cm x 20.3cm) - Weight: 2.05 lbs (0.93 kg's) Shackle Size 12mm hardened performance steel shackle with new hardened double-deadbolts to engage both ends increasing holding power. Anti-theft Protection Register your product online to activate the optional Anti-theft Protection Offer. In the unlikely event the product is defeated when used properly Kryptonite will pay out up to a certain value depending on the security value of the product. Visit our official website for further information. T&C’s apply. Key Safe Program Register your keys online and Kryptonite will * your first 2 keys for *, globally, in the event you lose them. Stainless Steel Keys Includes 2 stainless steel keys with ergonomic design to reduce torque. Review: Highly satisfied - This bike lock has served me very well over the years, very happy with quality and durability. Review: Cycle lock - Really good and heavy strong lock ## Features - 12mm HARDENED PERFORMANCE STEEL SHACKLE - New hardened double deadbolt design with anti-rotation resist against twist - Disc-style cylinder - Includes click style TRANSPORTATION BRACKET - Includes 4' flex cable for securing front wheel or other accessories ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07GSHZP39 | | Best Sellers Rank | 390 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 1 in Cycling U-Locks | | Brand | Kryptonite | | Colour | Black | | Control Method | Touch | | Controller Type | Hand Control | | Country of Origin | Taiwan | | Customer Reviews | 4.4 out of 5 stars 5,299 Reviews | | Finish | Painted | | Global Trade Identification Number | 00720018004370 | | Included Components | Lock, Flex cable and keys | | Item Dimensions | 20.3 x 10.2 x 20.3 centimetres | | Item Type Name | Accessories | | Item Weight | 930 g | | Item dimensions L x W x H | 20.3 x 10.2 x 20.3 centimetres | | Lock Type | Keyed Lock | | Lock type | Keyed Lock | | Manufacturer | MDSL4 | | Manufacturer Warranty Description | Limited lifetime. | | Material | Alloy Steel | | Model Name | Keeper 12 Standard W/Flex | | Model Number | 004370 Keeper 12 STD & KryptoFlex 410 | | Number of Pieces | 1 | | Part Number | 4370 | | Recommended Uses For Product | Bike | | Recommended uses for product | Bike | | Shape | Cylinder | | Smart Home Compatibility | Not Smart Home Compatible | | Special Features | Fob Unlock | | Special feature | Fob Unlock | | Style | Keeper 12 Standard W/Flex | | UPC | 720018004370 | | Unit Count | 1 unitΓ© | ## Product Details - **Brand:** Kryptonite - **Item dimensions L x W x H:** 20.3 x 10.2 x 20.3 centimetres - **Lock type:** Keyed Lock - **Material:** Alloy Steel - **Special feature:** Fob Unlock ## Images ![Keeper Bike U-Lock Standard with Braided Steel Cable, Heavy Duty Anti-Theft Bicycle U Lock, 12mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys | bike-locks - Image 1](https://m.media-amazon.com/images/I/819DQXa0DVL.jpg) ![Keeper Bike U-Lock Standard with Braided Steel Cable, Heavy Duty Anti-Theft Bicycle U Lock, 12mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys | bike-locks - Image 2](https://m.media-amazon.com/images/I/711dpk8fEOL.jpg) ![Keeper Bike U-Lock Standard with Braided Steel Cable, Heavy Duty Anti-Theft Bicycle U Lock, 12mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys | bike-locks - Image 3](https://m.media-amazon.com/images/I/61cfQV84iQL.jpg) ![Keeper Bike U-Lock Standard with Braided Steel Cable, Heavy Duty Anti-Theft Bicycle U Lock, 12mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys | bike-locks - Image 4](https://m.media-amazon.com/images/I/61XHHddqyQL.jpg) ![Keeper Bike U-Lock Standard with Braided Steel Cable, Heavy Duty Anti-Theft Bicycle U Lock, 12mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys | bike-locks - Image 5](https://m.media-amazon.com/images/I/81cz7Pllq5L.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Does "keeper 12 standard w/flex" come with a bracket?** A: Yes and it WILL snap after about 5 months of riding. **Q: Warning on the item about it containing lead. Has this been a deterrent for any of you?** A: No **Q: Since it has a key, is it not easily accessible to lock pickers?** A: I jhave never known a lock that can't be picked as locks are a deterent, but if a professional lock picker wants to open a lock they will. The quality of the lock only prolongs time which even thje most complicated locks can be picked withing 3 minutes or less. I us 3 locks for my bike which detares any theive as they go for the easy pickings, I have had two cycles stollen in my life and one was locked so lock you bike a number of times and don't make it easy. The truth is they have these portable grinders now which can go through any lock withing 30 to 40 secs so it not just easy pickings if they really want you bike they will have it so like i said multible locks don't maker it easy. **Q: I lost both keys for the lock, will I be able to get a replacement key?** A: you could always try asking the seller if they can send you another set of keys or you could always try looking for others seller's who might be able to help you but always be careful of who are dealing with whenever buying bike locks from other seller's other than amazon and any other lesser known seller's hope this of help to you ## Customer Reviews ### ⭐⭐⭐⭐⭐ Highly satisfied *by B***N on 28 May 2026* This bike lock has served me very well over the years, very happy with quality and durability. ### ⭐⭐⭐⭐⭐ Cycle lock *by M***K on 9 June 2026* Really good and heavy strong lock ### ⭐⭐⭐⭐ Decent, sturdy lock *by J***A on 13 July 2022* I was wary of buying this because of the reviews claiming the lock was fiddly to use with the key. I went ahead anyway, and I'm glad I did because it's a really decent lock for the price. Lots of people have said that it's too small, but I've had no trouble at all fastening the lock around a rooted post and my back wheel so it's plenty secure, and it's a standard sized bike. The fact that the base of the lock actually detaches makes it easier in my opinion, though this is something others seemed to dislike. The only reason I've gone for 4 stars instead of 5 is because I *did* have an incident with the key not working very recently, which is what I assume others were talking about, but I was able to see exactly what the issue was and know how to prevent it in the future (hopefully!). Basically, the best way I can think to describe it is that the channel of the lock is made up of segments that, when you put the key in, all twist at the same time. However, when you pull the key out after locking, if you slightly twist the key at all it twists those top few channels, but not the lowest ones. As a result, it's then hard to put the key back in, because the channel is no longer straight (I hope this makes sense!) But the fix is literally just to put the key in as far as you can get it, then twist gently until the channels re-align and you can push the key in all the way. I know that sounds complicated, but it's really not, and if you just experiment with the lock when you receive it, you'll see what I mean and how easy it is to resolve. If I end up having this issue again and it's worse, I'll edit my review, but for now I would say don't let the other reviews put you off. It's a good size, sturdy, and not tricky to use once you suss it out. Also, I noted that some reviews criticised the lock because their bike got nicked, but based on the photos they had secured the bike with the provided cable and then closed the cable with the heavy-duty lock. This is NOT how you lock a bike! Never have the wire cable as your primary source of security – secure the back wheel of the bike to a rooted post and, if you want the extra security, you can loop the wire through your front wheel. ## Frequently Bought Together - Kryptonite Keeper Bike U-Lock Standard with Braided Steel Cable, Heavy Duty Anti-Theft Bicycle U Lock, 12mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys,Black - Kryptonite Keeper 785 Bike Chain Lock, 2.8 Feet Long Heavy Duty Anti-Theft Bicycle Chain Lock with Keys for Bike, Motorcycle, Scooter, Bicycle, Door, Gate, Fence - Apple AirTag --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/98821665-keeper-bike-u-lock-standard-with-braided-steel-cable-heavy](https://www.desertcart.hr/products/98821665-keeper-bike-u-lock-standard-with-braided-steel-cable-heavy) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-05*