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

Source: https://www.ranked10.co.uk/fitness/best-bike-locks/kohlburg-helsinki-chain-lock
Ranked #4 in "Best Bike Locks 2026: 10 Ranked, Diamond Beats Gold on Price": https://www.ranked10.co.uk/fitness/best-bike-locks

- Price: £69.20 (checked on Amazon UK on 2026-09-19)
- Amazon rating: 4.6 from 1,150 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B08NCG1PFK?tag=ranked10-21

The KOHLBURG Helsinki chain lock takes #4 in this guide at £69.20, with a 4.6 average from 1,150 ratings. It is also the clearest example here of a grade and a price pointing in different directions: the Helsinki carries Sold Secure Gold, the same grade as the £15.95 Burg-Wächter 273S, for £53.25 more. KOHLBURG buys you length and mass rather than diameter — the listing gives 0.33 in / 8.3 mm four-edge links across 125 cm of chain weighing 2.5 kg.

The listing is blunt about its own trade-off, arguing that chain locks of 0.25 in diameter or less are much lighter but hardly offer reliable protection, and it sells the Helsinki for bicycle, e-bike, moped, scooter and motorcycle use. Worth noting when you compare across this guide: the 12 mm figure quoted on the cheaper £18.03 Combo is a U-lock shackle, not a chain link, so it is not the same measurement as the 8.3 mm here even though both are quoted in millimetres. Everything on this page comes from the Amazon listing and its customer reviews — we have not tested the lock ourselves.

## Specification

| Field | Value |
|---|---|
| Price | £69.20 |
| Rating | 4.6 out of 5 from 1,150 ratings |
| Sold Secure grade | Gold |
| Chain links | 0.33 in / 8.3 mm, 4-edge |
| Length | 125 cm / 4 ft / 49 in |
| Weight | 2.5 kg |
| Best Sellers Rank | 22nd in Cycling Chain Locks |
| Connectivity Protocol | Sold Secure Gold (as listed) |

## Questions people ask

**How long is the KOHLBURG Helsinki chain lock?**

The listing gives a total length of 125 cm, described as 4 ft or 49 inches, and says the extra length is there so the frame and the front wheel can both be locked to a fixed object.

**What security grade does the KOHLBURG Helsinki carry?**

The listing states Sold Secure Gold approval, and the Special Features field repeats it as 'Certified by Sold Secure with security level GOLD'.

**How thick are the chain links on the Helsinki?**

The listing gives 0.33 in / 8.3 mm strong 4-edge links, and says the lock head has an anti-lock-picking cylinder.

**How many keys come with the KOHLBURG Helsinki?**

The listing does not state a key count. The Included Components field reads only 'Lock with secure cylinder and 8.3 mm steel chain'.

**How much does the KOHLBURG Helsinki weigh?**

The Special Features field lists a weight of 2.5 kg.

**Where is the KOHLBURG Helsinki made and what warranty applies?**

Country of Origin is listed as Taiwan, and the manufacturer warranty description reads 'According to legal requirements.'