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

Source: https://www.ranked10.co.uk/fitness/best-bike-locks/ndakter-bike-d-lock
Ranked #9 in "Best Bike Locks 2026: 10 Ranked, Diamond Beats Gold on Price": https://www.ranked10.co.uk/fitness/best-bike-locks

- Price: £16.99 (checked on Amazon UK on 2026-09-19)
- Amazon rating: 4.7 from 760 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0GQTJH1P1?tag=ranked10-21

The NDakter Bike D Lock sits at number nine in this guide, priced at £16.99 with a 4.7-star average from 760 ratings and a Best Sellers Rank of 15th in Cycling U-Locks. It is a U-shaped lock with a black painted finish, supplied with three keys according to the product bullets, and it quotes 18mm of steel — more than the 12mm claimed by the £18.03 Kryptonite Combo two places above it, which costs £1.04 more.

That 18mm figure is worth reading twice, and so is the wording around it. The bullet reads "the U-lock cable measures 18mm thick" — cable, not shackle — and no third-party security grade appears anywhere in the listing. The spec sheet disagrees with the bullets elsewhere too: it gives the lock type as Mortise Lock and the control method as Remote, and its Material field says Brass, while the bullets describe the steel body and a brass key. Everything on this page comes from the Amazon listing for this product, not from any test we ran.

## Specification

| Field | Value |
|---|---|
| Price | £16.99 |
| Rating | 4.7 out of 5 stars from 760 ratings |
| Claimed U-lock thickness | 18mm, as stated in the product bullets |
| Keys supplied | 3, per two bullets; the Included Components field lists only "Bike d lock" (as listed) |
| Material (as listed) | Brass |
| Lock type (as listed) | Mortise Lock |
| Control method (as listed) | Remote |
| Best Sellers Rank | 4,795 in Sports & Outdoors; 15 in Cycling U-Locks |

## Questions people ask

**How thick is the NDakter Bike D Lock?**

One bullet says the U-lock cable measures 18mm thick. The listing gives no separate diameter for the shackle itself, and no security grade is quoted for the lock.

**How many keys come with it?**

Three, according to the bullets, which suggest keeping two with you and storing the third at home or the office. The Included Components field lists only "Bike d lock", so the keys are not itemised there.

**Does the NDakter lock carry a Sold Secure rating?**

No security grade — Sold Secure or otherwise — appears anywhere in this listing. The claims made are for an 18mm thickness and a hardened steel hook and loop.

**What does the specification say the lock type is?**

The spec sheet lists the Lock Type as Mortise Lock and the Control Method as Remote. That does not match a keyed U-lock, which is what the bullets and the photos describe.

**Does the NDakter Bike D Lock have weather protection?**

Yes, per the bullets: the chain is encased in a nylon protective sleeve, the outer cover is silicone, and the zinc alloy cylinder has a dust cover. The finish is listed as Painted.

**Where is the NDakter Bike D Lock made?**

The Country of Origin field says China, and the manufacturer and brand are both listed as NDakter.