# Best Bike Locks 2026: 10 Ranked, Diamond Beats Gold on Price

Source: https://www.ranked10.co.uk/fitness/best-bike-locks
Published: 2026-09-19 | Updated: 2026-09-19 | Prices checked on Amazon UK on 2026-09-19

Two Burg-Wächter D-locks here are ranked the wrong way round by price. The 273S at £15.95 carries Sold Secure Gold. The 200D at £13.99 claims Sold Secure Diamond for pedal cycles, so the higher grade sits on the lock that costs £1.96 less. That is the pattern across the best bike locks on Amazon: the badge, the price and the small print rarely agree. The 200D then contradicts itself on what is in the box, with one bullet reading 'typically 2 keys included' and the specification field reading '3 Keys'. Kryptonite has a currency problem too. The £18.03 Combo U-lock quotes its Anti-Theft Protection Offer at 'up to $500', while the £38.75 Kryptolok quotes the same programme in sterling at £1,000.

We ranked ten of the best bike locks on Amazon on three plain criteria: what each listing claims about Sold Secure grading, what it states about shackle thickness in millimetres, and how the price moves against both. Claimed shackle thickness across the ten runs from 12 mm on the £18.03 combination lock to 32 mm on the £299.99 Hiplok, which is 2.7 times the steel for 16.6 times the money. Where a listing disagrees with itself, we give both figures and let you decide which one to believe.

## The ranking

### 1. Kryptonite Evolution Mini-7 U-Lock with 4 ft Cable

- Price: £46.99 | Amazon rating: 4.5 from 14,170 ratings
- Full review: https://www.ranked10.co.uk/fitness/best-bike-locks/kryptonite-evolution-mini-7
- Buy on Amazon: https://www.amazon.co.uk/dp/B06XZT8KZ1?tag=ranked10-21

Top of our best bike locks ranking on 14,170 ratings, with a 13 mm hardened shackle and a 4 ft cable in the box.

First place goes on volume as much as specification. The Evolution Mini-7 holds a 4.5 average from 14,170 ratings and ranks 2 in Amazon's Cycling U-Locks category, the largest sample of real owners anywhere in this guide. Its 13 mm hardened MAX-Performance steel shackle is not the thickest here: the £16.31 Sportneer claims 18 mm and the £299.99 Hiplok claims 32 mm. Crucially, the patent-pending double deadbolt and disc-style cylinder address twist and picking rather than raw cut resistance, which is where the extra money over a £16 lock goes.

In practice, the three-piece packaging is the selling point. Lock, 4 ft double-loop KryptoFlex cable and bracket arrive together, which is what a best bike lock and cable set should mean. The cable secures a front wheel or a second bike to the U-lock rather than replacing it. A sliding dustcover keeps grit out of the cylinder, and the 13 mm shackle plus the cable covers most urban locking points without a second purchase.

That said, this is not the lock for a £3,000 e-bike left overnight on a street. Bolt-cutter resistance at 13 mm is a claim about hardened steel, not a guarantee, and the warranty runs only one year. Riders who need the best heavy duty bike lock should look much further down this list, and anyone buying a keyed lock purely for insurance paperwork is paying £46.99 for a cable they may never uncoil.

Pros: 4.5 average from 14,170 ratings, the largest sample in the guide; 13 mm hardened MAX-Performance steel shackle; Double deadbolt design and a pick-resistant disc-style cylinder; Includes a 4 ft KryptoFlex double-loop cable and mounting bracket; Ranks 2 in Amazon's Cycling U-Locks category
Cons: £46.99, the third-highest price here and three times the cheapest lock; 13 mm shackle is thinner than the 16 mm and 18 mm claims further down the list; One-year warranty, against 2 years on the £38.75 Kryptolok; No Sold Secure grade mentioned in the listing bullets

### 2. Hiplok DX1000 Anti-Angle-Grinder D Lock, 32 mm

- Price: £299.99 | Amazon rating: 4.7 from 211 ratings
- Full review: https://www.ranked10.co.uk/fitness/best-bike-locks/hiplok-dx1000-d-lock
- Buy on Amazon: https://www.amazon.co.uk/dp/B0D7JVP6QL?tag=ranked10-21

The only lock here claiming angle-grinder resistance, at 16.6 times the price of the cheapest pick.

Second place, top price. At £299.99 the DX1000 costs 16.6 times the £18.03 Kryptonite Combo, while claiming 32 mm of shackle against that lock's 12 mm, which is 2.7 times the steel. It is the only pick in this guide that names angle-grinder resistance, backed by anti-rotation double locking tabs, and the only one carrying Sold Secure Powered Cycle Diamond. The listing states that a thief must cut both sides of the shackle to release it.

In practice the internal area is 205 mm x 112 mm, which the listing says fits most bicycles, e-bikes and motorcycles. That makes it a genuine candidate for the best bike lock for electric bikes and cargo bikes, where a heavier frame and a fatter tyre often rule out a standard U-lock. Weight is 2.75 kg, and three coded replaceable keys arrive with a key code card, so a lost key is not a written-off lock. The neon yellow finish is a deterrent in itself.

The catch is the ratings base. 211 reviews against 14,170 for the Kryptonite at the top means the 4.7 average rests on a much thinner sample. Meanwhile, 2.75 kg is a lot to carry daily, and no bracket is included: Hiplok sells the bicycle bracket and motorbike lock sleeve separately. If you park in a locked shed or a guarded office, you are paying for grinder resistance you may never actually test.

Pros: 32 mm hardened steel shackle, 2.7x the 12 mm on the £18.03 Combo; Sold Secure Powered Cycle Diamond, the highest powered-cycle grade in the guide; Anti-rotation double locking tabs require both shackle sides to be cut; Three coded replaceable keys plus a key code card; 205 x 112 mm internal area suits e-bikes, cargo bikes and motorcycles
Cons: £299.99, which is 16.6x the cheapest lock here; 2.75 kg to carry or mount on the frame; Bicycle bracket and motorbike lock sleeve sold separately; 211 ratings is a small base for a 4.7 average

### 3. Kryptonite Kryptolok Standard U-Lock with 4 ft Cable

- Price: £38.75 | Amazon rating: 4.5 from 6,017 ratings
- Full review: https://www.ranked10.co.uk/fitness/best-bike-locks/kryptonite-kryptolok-u-lock
- Buy on Amazon: https://www.amazon.co.uk/dp/B06XCLTVPQ?tag=ranked10-21

Gold-rated U-lock plus cable at £38.75, with the Anti-Theft Protection Offer quoted at £1,000 in sterling.

Third, and the second Kryptonite. The Kryptolok is Sold Secure Bicycle Gold certified and rated 6/10 on Kryptonite's own security scale, which the listing states plainly, and that is unusual enough to be useful. Its 4.5 average comes from 6,017 ratings. Crucially, it is one of only two locks in this best bike locks guide quoting the Anti-Theft Protection Offer in pounds, at £1,000, against 'up to $500' on the cheaper Combo U-lock.

The package is a standard U-lock plus a 4 ft KryptoFlex cable, with Key Safe Program registration covering a lost key. In theory that combination handles most commuter locking: shackle through frame and rack, cable through the front wheel, code or key registered. By contrast with the £46.99 Evolution Mini-7 above it, you lose the 13 mm shackle and the double deadbolt, and gain a lower price and a longer warranty, 2 years against 1.

That said, 6/10 on the maker's own scale is a mid-grade claim, not a top one. The shackle thickness is not stated in the listing at all, which is worth noting when the locks around it quote 12 mm, 13 mm, 16 mm and 32 mm. Nor does the listing name a Sold Secure grade beyond Gold. If you need a stated millimetre figure to satisfy an insurer, ask before buying, or choose a lock whose listing gives one.

Pros: Sold Secure Bicycle Gold certified; Anti-Theft Protection Offer quoted at £1,000 in sterling; 4 ft KryptoFlex cable and Key Safe Program registration included; 4.5 average from 6,017 ratings; 2-year manufacturer warranty, the longest of the three Kryptonite picks
Cons: Rated only 6/10 on Kryptonite's own security scale; No shackle thickness given anywhere in the listing; £38.75 buys fewer stated features than the £46.99 Evolution Mini-7 below it in rank; Cable is a 4 ft flex loop, not a hardened chain

### 4. KOHLBURG Helsinki Chain Lock, 125 cm, Sold Secure Gold

- Price: £69.20 | Amazon rating: 4.6 from 1,150 ratings
- Full review: https://www.ranked10.co.uk/fitness/best-bike-locks/kohlburg-helsinki-chain-lock
- Buy on Amazon: https://www.amazon.co.uk/dp/B08NCG1PFK?tag=ranked10-21

A 125 cm chain with 8.3 mm four-edge links, the longest lock here and the only chain in the ten.

Fourth place goes to the one chain lock in the ten. The Helsinki runs 4 ft / 125 cm, carries Sold Secure Gold, and weighs 2.5 kg. Its links measure 8.3 mm across and are described as four-edge, which is thinner than the 12 mm shackle on the cheapest U-lock here. The difference is geometry: a chain is attacked link by link rather than at a single point, and the listing argues that locks under 0.25 in give up too much protection to save weight.

In practice, length is the argument. 125 cm lets you pass the chain through both wheels and the frame and still reach a fixed anchor, which makes this a strong candidate for the best bicycle lock for anyone securing two bikes, or a bike and a trailer, to the same post. The chain is sleeved to protect paintwork and the lock head carries an anti-lock-picking cylinder. At 2.5 kg it is lighter than the 2.75 kg Hiplok, though far bulkier to carry.

Even so, this is not a lock that slips into a jersey pocket or a saddle bag. If you want a short, thick shackle and nothing else, a U-lock does the job with less bulk. The manufacturer warranty is described only as 'according to legal requirements', which is vaguer than the 1 and 2 year terms offered on the Kryptonite picks. Buy it for reach, not for packed size.

Pros: 125 cm / 4 ft length reaches both wheels and a fixed anchor; Sold Secure Gold certified; 8.3 mm four-edge hardened links, per the listing; Anti-lock-picking cylinder plus a sleeve to protect paintwork; 2.5 kg, lighter than the 2.75 kg Hiplok
Cons: 8.3 mm links are thinner than the 12 mm shackle on the cheapest U-lock here; Bulk, not weight, is the carrying problem; £69.20 puts it above three U-locks in this ranking; Warranty described only as 'according to legal requirements'

### 5. Burg-Wächter 273S Sold Secure Gold D-Lock, Large

- Price: £15.95 | Amazon rating: 4.2 from 2,108 ratings
- Full review: https://www.ranked10.co.uk/fitness/best-bike-locks/burg-wachter-273s-d-lock
- Buy on Amazon: https://www.amazon.co.uk/dp/B00WE4FU5U?tag=ranked10-21

Sold Secure Gold for £15.95, the cheapest Gold-rated lock here and 4th in its Amazon category.

Fifth, and the first half of the pricing puzzle. The 273S costs £15.95 and carries Sold Secure Gold for bicycles, which is more than any lock below it in this ranking can claim. It averages 4.2 from 2,108 ratings and ranks 4 in Amazon's Long Shackle Padlocks category, so note that Amazon files it as a padlock rather than a cycling lock.

The mechanism is double-bolted, which means both ends of the hardened steel shackle are secured rather than one. Burg-Wächter rates the lock 8.5 on its own scale, and an ABS plastic cover sits over the body to stop it scratching the frame. As a result, this is the cheapest route in this best bike locks list to a Gold-rated shackle, and it costs £1.96 more than a lock claiming a higher grade.

That said, the rating split is the most polarised in the guide: 10% one-star against 64% five-star, from 2,108 ratings. It is also sold as a long shackle padlock, so the shackle may be longer than a cyclist expects and the internal locking area is never quoted. If you want a stated internal dimension before you buy, look at the £16.31 Sportneer or the £25.99 NDakter instead.

Pros: Sold Secure Gold approved for bicycles at £15.95; Double-bolted mechanism secures both shackle ends; 4.2 average from 2,108 ratings; Hardened steel shackle and body, Burg-Wächter rating 8.5; ABS plastic cover protects frame paintwork
Cons: Filed under Long Shackle Padlocks, not cycling locks; Internal shackle dimensions are not stated; Most polarised rating split here, at 10% one-star; Undercut on grade by the £13.99 200D below it

### 6. Burg-Wächter 200D 16 mm Heavy Duty D-Lock, Diamond Rated

- Price: £13.99 | Amazon rating: 4.3 from 120 ratings
- Full review: https://www.ranked10.co.uk/fitness/best-bike-locks/burg-wachter-200d-d-lock
- Buy on Amazon: https://www.amazon.co.uk/dp/B0GHNQ59KR?tag=ranked10-21

The cheapest lock here and the highest grade, Diamond for pedal cycles at £13.99, with a key count that disagrees with itself.

Sixth, and the awkward one. The 200D is the cheapest lock in the ranking at £13.99 and claims the higher certification of the two Burg-Wächters: Sold Secure Diamond for bicycles, plus Gold for motorcycles. On that evidence it is the best sold secure bike lock badge per pound anywhere in this guide, and it costs £1.96 less than the Gold-rated 273S above it.

The hardware claim is a 16 mm case-hardened steel shackle and body, double-bolted, with a rotating keyhole cover to keep dirt and moisture out. Item dimensions are listed as 21 x 12 x 4 cm. For riders who want the best d lock for bikes on a tight budget, that is hard to argue with on paper: 16 mm claimed is thicker than the £38.75 Kryptolok and the £46.99 Evolution Mini-7, at a quarter of the price.

The catch is what arrives in the box. One bullet says the lock is 'supplied with keys for controlled access (typically 2 keys included)'. The specification field says 'Included Components: 16mm D Lock, 3 Keys'. Both cannot be right, and the 4.3 average comes from only 120 ratings, the second-smallest sample here. If you need a definite key count for insurance or shared use, confirm it before ordering.

Pros: Sold Secure Diamond for bicycles at £13.99, the highest grade in the guide; Also rated Sold Secure Gold for motorcycles; 16 mm case-hardened steel shackle and body, double-bolted; Rotating keyhole cover against dirt and moisture; 2-year manufacturer warranty
Cons: Key count disagrees between the bullet (typically 2) and the specification (3 Keys); Only 120 ratings, the second-smallest base here; No internal shackle dimensions published; Motorcycles get Sold Secure Gold, not Diamond

### 7. NDakter Keyless Combination D-Lock with 5 ft Cable

- Price: £25.99 | Amazon rating: 4.5 from 987 ratings
- Full review: https://www.ranked10.co.uk/fitness/best-bike-locks/ndakter-combo-d-lock
- Buy on Amazon: https://www.amazon.co.uk/dp/B0BS3T63ST?tag=ranked10-21

The cheaper of the two keyless locks, with a 5 ft cable and the largest quoted internal area of the U-locks.

Seventh, and the first keyless option. The NDakter combo uses a 4-digit resettable code instead of a key, and the shackle is quoted at 0.57 in, roughly 14.5 mm, with an internal locking area of 7.5 x 4.5 in. That is the largest internal space quoted among the U-locks here, which matters if you have a chunky down tube or want to catch a second bike.

Meanwhile the supplied cable is 5 ft long and 0.47 in thick, about 12 mm, so nearly the equal of the £18.03 Kryptonite Combo's shackle. In practice the pair covers frame, wheel and a fixed point in one purchase, and the code removes lost-key risk entirely. The default combination is 0000 and the reset procedure is spelled out in the listing, so you are not guessing.

That said, a combination cannot be re-keyed if the code becomes known, and there is no Sold Secure or Diamond grading anywhere in this listing, which is unusual among the best bike locks here. Which means the 4.5 average from 987 ratings tells you about usability, not theft resistance. If your insurer names a certification, this is not the lock to send them.

Pros: 4-digit resettable combination, so no key to lose; 7.5 x 4.5 in internal area, the largest quoted among the U-locks; 5 ft steel cable at 0.47 in thick included; 4.5 average from 987 ratings; 0.57 in hardened alloy steel shackle with a zinc alloy lock head
Cons: No Sold Secure grade stated anywhere in the listing; Code cannot be changed after a theft or on a shared bike; 0.57 in shackle is well under the 16 mm and 18 mm claims here; Rated 16th in Cycling U-Locks, below cheaper alternatives

### 8. Sportneer 18 mm U-Lock with 6 ft Cable and Bracket

- Price: £16.31 | Amazon rating: 4.5 from 291 ratings
- Full review: https://www.ranked10.co.uk/fitness/best-bike-locks/sportneer-18mm-u-lock
- Buy on Amazon: https://www.amazon.co.uk/dp/B0CS698VCX?tag=ranked10-21

An 18 mm claimed shackle with a 6 ft cable and mounting bracket for £16.31, the fullest bundle at this price.

Eighth. On the numbers, the Sportneer is the best bike u lock bundle at this price: a 0.71 in / 18 mm shackle, a 6 ft steel cable, an adjustable mounting bracket and two keys, all for £16.31. It weighs 2.5 lbs, so about 1.1 kg, and a 0.1 in silicone coating keeps the frame unmarked.

The listing also claims the lock can withstand hydraulic shear forces up to 12 tons and names a zinc alloy core with an alloy steel head. In practice you also get a bracket that fits tubes from 0.87 in to 3.15 in, which most locks in this guide do not include at all. As a result this is the pick for someone who wants the whole kit in one box rather than three separate orders.

However, there is no Sold Secure certification anywhere in this listing, and the 18 mm figure is a manufacturer measurement rather than an independent one. Also worth noting: the stated item dimensions of 30.5 x 17 x 7.5 cm correspond only loosely to the 11.5 x 6.25 in quoted in the first bullet. If independent grading matters to your insurer, this lock does not provide it.

Pros: 0.71 in / 18 mm claimed shackle at £16.31; 6 ft steel cable, adjustable bracket and two keys included; Bracket fits bike tubes from 0.87 in to 3.15 in; 4.5 average from 291 ratings; Silicone coating to protect paintwork
Cons: No Sold Secure certification stated in the listing; 12-ton shear claim is the manufacturer's, not independently tested; Item dimensions in centimetres only loosely match the inches quoted; Two keys is fewer than the three supplied with several rivals

### 9. NDakter 18 mm Heavy Duty D-Lock with 3 Keys

- Price: £16.99 | Amazon rating: 4.7 from 760 ratings
- Full review: https://www.ranked10.co.uk/fitness/best-bike-locks/ndakter-bike-d-lock
- Buy on Amazon: https://www.amazon.co.uk/dp/B0GQTJH1P1?tag=ranked10-21

The highest-rated lock here at 4.7 from 760 ratings, with an 18 mm shackle and three keys for £16.99.

Ninth, and the best-rated entry in the whole guide. The NDakter D-lock holds a 4.7 average from 760 ratings, 82% of them five-star, and quotes an 18 mm steel shackle with three keys for £16.99. Among the best bike locks here for review consensus, nothing else matches that rating on that many reviews.

At the same time, the design choices are practical. There is a zinc alloy cylinder with a dust cover, brass keys the listing describes as bend-resistant, and a nylon sleeve over the shackle to protect paintwork. Three keys means two on your person and one at home, which is the sensible split. The listing describes a double-opening design and a lightweight, portable build aimed at daily carrying.

The catch is what the specification fields say. Lock Type is listed as 'Mortise Lock', Control Method as 'Remote', and Material as 'Brass', none of which describes a bicycle U-lock; the material field almost certainly refers to the keys rather than the shackle. There is also no Sold Secure grade. Even so, at £16.99 with three keys and 760 ratings, it is a reasonable everyday lock for a bike you would not leave outside overnight.

Pros: 4.7 average from 760 ratings, the highest-rated lock in the guide; 18 mm steel shackle with three keys supplied; Zinc alloy cylinder with dust cover and nylon sleeve; £16.99, undercutting several locks with weaker ratings; Lightweight, portable build aimed at daily carrying
Cons: No Sold Secure certification stated; Specification fields read 'Mortise Lock', 'Remote' and 'Brass'; 18 mm is a maker's figure, not independently measured; No cable or mounting bracket in the box

### 10. Kryptonite Combo U-Lock, 12 mm Shackle, 4-Digit Code

- Price: £18.03 | Amazon rating: 4.3 from 1,069 ratings
- Full review: https://www.ranked10.co.uk/fitness/best-bike-locks/kryptonite-combo-u-lock
- Buy on Amazon: https://www.amazon.co.uk/dp/B0BDGK2DWG?tag=ranked10-21

The thinnest shackle here at 12 mm, with an Anti-Theft Protection Offer quoted in dollars while a sister lock quotes pounds.

Tenth, and the second half of the Kryptonite currency puzzle. The Combo U-lock quotes an Anti-Theft Protection Offer of 'up to $500' at £18.03. The £38.75 Kryptolok, same brand, same programme, quotes £1,000. Meanwhile the shackle here is 12 mm hardened steel, the thinnest figure claimed anywhere in this guide.

In practice the appeal is the 4-digit resettable combination and the Combo Safe Program, which lets you register the code so customer service can help if you forget it. Interior dimensions are 4 x 8 in and exterior 6.5 x 9.5 in, so it fits a standard Sheffield stand without a fight. Total ratings are 1,069 at a 4.3 average, and the listing adds a lifetime warranty.

That said, if you are weighing up the best bike locks for a commuter bike under, say, £500, a 12 mm shackle is entry-level by this guide's own numbers, at roughly a third of the 32 mm Hiplok. The dollar-denominated ATPO is also a step down from the £1,000 sterling offer on the Kryptolok, and no Sold Secure grade appears in the listing. Buy it for keyless convenience at £18.03, not for the steel.

Pros: 4-digit resettable combination, no key to lose; Combo Safe Program registration for a forgotten code; Interior 4 x 8 in fits a standard Sheffield stand; 4.3 average from 1,069 ratings; Lifetime warranty stated in the listing
Cons: 12 mm shackle, the thinnest claimed in this guide; Anti-Theft Protection Offer quoted as 'up to $500' rather than sterling; No Sold Secure grade named in the listing; £18.03 buys an uncertified lock when a Gold-rated one exists at £15.95

## Verdict

For most riders, the £15.95 Burg-Wächter 273S is the sensible place to start: Sold Secure Gold, a 4.2 average from 2,108 ratings, and enough left over for a secondary cable. If your bike cost four figures and lives outside overnight, the £299.99 Hiplok DX1000 is the only lock in this guide claiming resistance to angle grinders, and 2.75 kg is what 32 mm of steel weighs. If you want keyless convenience instead, the £25.99 NDakter combination lock is the cheaper of the two code-operated options, though its 0.57 in shackle sits well below the heavy-duty end. Either way, the best bike locks for electric bikes and cargo bikes need a longer shackle or a chain, not a tighter one. Buy the grade your insurer asks for, then buy the size that fits your frame, because the best bike locks are the ones you will still use on a wet Tuesday in February.