The two locks, side by side
Every cell below is a figure the listing or the retailer spec table publishes. The blanks are real — neither listing publishes a weight, which is genuinely annoying for a product you have to carry, and we are not going to estimate one.
| | KryptoLok Standard | Evolution Mini-7 |
|---|
| Shackle | 12.7mm hardened steel | 13mm hardened kryptonium steel |
| Sold Secure grade | Silver (US listing) — see the conflict below | Gold (US listing) |
| Kryptonite in-house score | Not published on the listing | 7 out of 10 (bike-components spec table) |
| Body | Standard (full size) | Mini-7, 8 x 17.8cm |
| Locking | Disc-style cylinder | Double deadbolt + reinforced high-security disc cylinder |
| Cable | 4ft KryptoFlex | 120cm, 10mm thick |
| In the box | Mounting bracket, 2 keys | FlexFrame-U bracket, 3 keys (one with a lamp) |
| Weight | Not published | Not published (spec table cell is a unit error) |
The grade conflict, stated plainly
We will not pretend this is tidy. The US Amazon listingfor the KryptoLok Standard U-lock reads “Sold Secure Silver Certified” in its own title. Several UK retailer listingsfor a KryptoLok Standard U-lock describe the same model name as Sold Secure Gold. Kryptonite’s own product pages return 404 at the URLs search engines hold for these locks — the same wall we hit writing the Fahgettaboudit Mini review — so we could not go to the maker to settle it.
There are two innocent explanations and we cannot distinguish between them from published sources. Sold Secure grades are awarded to a specific submitted product, and “KryptoLok Standard” has covered several generations and regional variants over the years; a grade earned by one revision does not automatically carry to the next. It is also possible the UK listings are simply out of date. What we can say is what each listing we can actually read publishes today, which is what the table above does.
The practical takeaway is not “ignore the grade.” It is the opposite: buy the lock whose grade is printed on the listing you are buying from, today. If you are buying in the US and you want Gold, the Evolution says Gold on its own title and the KryptoLok says Silver on its own title. That is the version of the fact that applies to your purchase. If this matters to you — and for insurance purposes it sometimes does literally matter — screenshot the listing at the time you buy.
Where each one actually wins
Buy the Evolution Mini-7 if your bike is ever out of sight outdoors.Station parking, a street rack outside a store, an apartment courtyard, anywhere the bike sits for hours while you are somewhere else. Three things stack in its favor: an independent Gold grade on the listing, a double deadbolt (both legs of the shackle are held, so cutting one does not open the lock), and the mini body that gives a crowbar or a bottle jack almost nowhere to sit. It is also the cheapest lock in Kryptonite’s range that gets you a Gold grade, which is the real reason to pick it over the KryptoLok rather than the 0.3mm.
Buy the KryptoLok Standard if the parking is low-risk or the reach is the problem.Two genuine cases. First, a bike that comes indoors every night and is only ever locked for twenty minutes in daylight — a Silver lock is proportionate there, and the money saved is better spent on a second lock for the wheel than on upgrading the first. Second, and this is the one people underestimate: the Standard body opens enough to go around things the Mini-7 cannot. If the only thing to lock to on your route is a thick signpost or a large-diameter rack, a more secure lock that does not fit is worse than a slightly less secure lock that goes through the frame and the rack properly.
Neither, if your bike sleeps outdoors in a city.This is worth saying bluntly because both of these locks get bought for that job and neither is built for it. A 12.7mm or 13mm shackle is a short job for an angle grinder, and a lock left on a street overnight is exactly the situation where a grinder gets used. That is a 16–18mm problem, and it is covered on the angle-grinder-resistant locks page and the Evolution versus New York comparison, which picks up exactly where this page stops.
What the Keeper is doing on this page
We included the Keeper 12 as a third row for one reason: a lot of people searching “KryptoLok vs Evolution” are really asking “how little can I spend on a lock that is not a joke.” The Keeper is that answer — a 12mm hardened shackle rated Sold Secure Silver, at a price closer to a cable lock than to either lock above. It is the floor we would recommend, and it is a real U-lock rather than security theater.
It is not, however, a cheaper KryptoLok. It has a thinner shackle, no bundled cable for the front wheel, and no claim on the Gold tier. If your bike is worth more than a few hundred dollars, the step from Keeper to Evolution is the single best money-to-security move in this whole lineup, and the step from KryptoLok to Evolution is the second best. We argue the actual spend tiers out in how much to spend on a bike lock.
The cable is not the second lock
Both of the main locks here ship with a flex cable — 4ft on the KryptoLok, 120cm at 10mm thick on the Evolution — and both cables exist to loop a front wheel so it is not trivially removable. That is a worthwhile job and it is genuinely convenient to have it in the box.
It is also convenience security and nothing more. A 10mm braided cable is cut by a decent pair of hand cutters in seconds; it deters a passer-by who wanted a free wheel, and it stops nobody who came equipped. Treat the cable as what it is: the thing that makes your wheel a less attractive target than the unsecured wheel next to it. If you want the wheels and saddle actually secured, that is a different technique and some different hardware, and it is covered in locking your wheels and saddle.
A note on the in-house 1-10 number
Kryptonite publishes its own security score for each lock on a 1–10 scale, and the retailer spec table we could read gives the Evolution Mini-7 a 7 out of 10. It is useful for ranking locks withinKryptonite’s own range — a 7 really does sit below the 10 the company gives its Fahgettaboudit line — and it is worth precisely nothing for comparing across brands, because every maker grades its own homework on its own scale.
That is the entire argument for caring about Sold Secure instead. It is an independent test house, the grade is awarded to a specific submitted product, and Bronze, Silver, Gold and Diamond mean defined things about how long a lock resisted defined attacks. We walk through what each grade actually involves in bike lock security ratings explained. When a maker’s own number and an independent grade disagree about which of two locks is better, believe the independent one.
