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In this guide
Kryptonite's Evolution line sits between the entry-level KryptoLok and the New York locks that are meant for overnight city parking. The Mini-7 is the mid-length Evolution U-lock: a 13 mm hardened Max-Performance steel shackle with an interior of 3.25 by 7 inches, closed by a hardened double deadbolt on both sides of the crossbar. The version Kryptonite currently lists in the US, model 002079, ships with a 4-foot Flex cable for the front wheel, a FlexFrame-U bracket and three stainless steel keys, and weighs 3.55 pounds altogether.
Kryptonite sells through retailers and prints no price on its own site, so the money question is left to wherever you buy. What the maker does publish is a security rating of 7 out of 10 and an Anti-Theft Protection Offer that pays a registered owner up to $2,500 if a bicycle is stolen because the lock was broken open. Those two numbers, and the compromise of a short shackle, are what you are buying.
Our verdict
A sensible city lock: 13 mm hardened steel and a double deadbolt in a 7-inch shackle that is tight enough to frustrate leverage attacks and large enough to reach a rack, with a $2,500 theft payout for people who register.
- A good fit for
- A commuter who locks a mid-priced bike to fixed racks and posts in a US city and is willing to carry three and a half pounds of steel on the frame.
- We would skip it if
- Your bike is worth more than $2,500, you lock overnight in a high-theft area, or you need to loop a fat downtube and a wheel through the same shackle.
Reasons to consider it
- 13 mm hardened Max-Performance steel shackle with a hardened double-deadbolt crossbar
- Disc-style cylinder that Kryptonite describes as pick and drill resistant, plus a sliding dust cover
- Anti-Theft Protection Offer of up to $2,500 on a bicycle and a Key Safe program for replacement keys
The compromises
- Kryptonite lists no price of its own, so the cost depends entirely on the retailer
- The 7-inch shackle limits what fits: one frame tube and a rack, not a frame plus a wheel
- The cable is only a secondary deterrent and the theft offer explicitly excludes it
What we have not verified: The lock was not attacked, cut or carried here; how long the cylinder resists a practiced picker, how the bracket behaves on rough pavement, and the lock's real-world weight on a bike were not assessed.
The things in this guide
A closer look at the products, who they may suit, and what to check before buying.
Evolution Mini-7 U-Lock with 4 ft Flex Cable
A 13 mm hardened shackle with a double deadbolt and a disc-style cylinder, a 7-inch opening that reaches most racks, a frame bracket and a wheel cable in one package, plus a registered theft payout of up to $2,500.
Before you buy: No maker price, a shackle too short to capture frame and wheel together, and a cable that adds weight but no real security.
Price checked September 11, 2026. Retailer prices can change.Thirteen millimeters, two deadbolts, one dust cover
The shackle is 13 mm hardened Max-Performance steel, which Kryptonite says resists bolt cutters and leverage attacks. Thirteen millimeters is the diameter where hand-held bolt cutters stop being a realistic tool for a thief on foot; a portable angle grinder still goes through it, as it goes through every U-lock at any price. The crossbar uses a hardened double deadbolt, so the shackle locks on both legs, and Kryptonite calls that design its answer to twist attacks, where a thief jams a bar into the shackle and rotates it against a single-sided latch.
The cylinder is disc-style, the kind that Kryptonite describes as pick and drill resistant and that replaced the old tubular cylinders across the industry. A sliding dust cover protects the keyway, which matters for a lock that lives outdoors on a bike and collects grit. The whole thing wears a protective vinyl coating over the steel, and the lock ships with three stainless steel keys. Six US patents are listed on the page, which is a hint that the deadbolt and cylinder are current designs and not a rebadge of an older lock.
A 7-inch opening is a choice, not a compromise
Kryptonite lists the interior of the Mini-7 at 3.25 by 7 inches, or 8.3 by 17.8 cm. The short shackle is deliberate: less empty space inside the U leaves less room for a thief to insert a jack or a lever, which is the main reason mini U-locks are rated as high as their longer siblings. The trade is reach. Seven inches captures a frame tube and a standard rack or a signpost, and it will usually get a seat stay and the rear rim together on a road bike, but it will not take a fat downtube plus a front wheel plus a rack.
The kit weighs 3.55 pounds, or 1.61 kg, and that figure includes the 4-foot Flex cable. For scale, the Evolution Mini-9 without a cable is listed at 3.15 pounds with a 9.5-inch interior, so the lock alone is likely a little over three pounds and the cable is most of the rest. The FlexFrame-U bracket that comes in the box mounts the lock to a frame tube, and Kryptonite's manual for it is linked from the product listing. Whether that bracket rattles on rough pavement was not assessed.
Rated 7 of 10, worth $2,500 to a registered owner, priced by someone else
Kryptonite rates the Evolution Mini-7 at 7 on its 10-point scale, and the rating sets the Anti-Theft Protection Offer: a registered owner whose bicycle is stolen because the lock was opened or broken by force can claim the base cost of the bike up to $2,500 in the US, or an insurance deductible, whichever is less. Registration has to happen no later than 30 days after buying the lock and costs $34.99 for one year or $54.99 for two. A claim needs a police report within 72 hours, notice to Kryptonite within seven days, the broken lock and one original key in photographs, and the registration number. The offer is not insurance and covers consumers only.
Two limits deserve attention. The cable in this package is excluded from the offer, and Kryptonite's own wording is that it is a secondary deterrent that should not be your primary lock. And the maker lists no price of its own; kryptonitelock.com is a catalog with a store locator, so the going rate is whatever your bike shop or online retailer charges, and no figure is quoted here for that reason. The Key Safe program is a small consolation: the first pair of replacement keys costs $6.95 in shipping and handling if you register the key number.
Lifetime coverage on the lock, not on rust
Kryptonite covers lock products for the lifetime of the original user, with the company choosing between repair, replacement and a refund of what you paid once the lock is returned with a description of the fault and a receipt. Lights get two years. The warranty is not transferable, so a second-hand lock has none, and shipping the lock back is on you.
The exclusions are the ones that matter for a lock that lives outside. Corrosion and water damage are listed under improper environmental conditions and are not covered, along with normal wear, scratches, and deterioration from paints or solvents. In practice that means the warranty protects you from a cylinder that fails or a deadbolt that jams for reasons of manufacture, not from a keyway that seizes after a winter of salt spray. Lubricating the cylinder is the owner's job, and the exclusion makes that explicit.
Skip it if the bike is worth more than the payout
Pass on the Mini-7 if your bicycle costs more than $2,500 or spends nights on the street in a city with a grinder problem. A 7-of-10 rating is honest about where the lock sits: it is meant to make your bike harder to steal than the next one during a workday, not to survive a determined attack at 3 a.m. Kryptonite's own New York locks exist for that job, at roughly twice the weight, and if the payout ceiling is below your bike's value, the theft offer is a partial refund at best.
Also pass if your locking habit needs a longer shackle. Cargo bikes, fat-tube e-bikes, and riders who insist on capturing the frame and both wheels with one lock will fight the 7-inch opening daily, and the included cable is a wheel-keeper, not a substitute. The Mini-9 gives 2.5 more inches for the same rating; a chain gives more still. Buy the Mini-7 for a mid-priced commuter locked to fixed racks in daylight, and register it, because an unregistered ATPO is worth nothing.
How we put this together
Built from the product pages and listings below, without test scores or results we have not measured. Specifications and prices change, so check the original page for the exact model, current price, delivery, and returns.
- Kryptonite: Evolution Mini-7 With 4' Flex Cable (model 002079) (opens in a new tab)
- Kryptonite: Anti-Theft Protection Offer (opens in a new tab)
- Kryptonite: Limited Product Warranty (opens in a new tab)
- Kryptonite: Order Keys (opens in a new tab)
- Kryptonite: Evolution Mini-9 (model 002086) (opens in a new tab)
