SUMMARY

The alarm chain lock of the brand SiPRi has impressed with a very good score. Thus, the test product has qualified for our Qualitätssiegel.de seal of approval and was ultimately rated with the final grade 1.2.

Short product info:

The alarm chain lock from SiPRi offers maximum security through a loud alarm and a stable steel chain to reliably protect your bicycle from theft.

This product was submitted to us for testing: Link to the product on Amazon

About the test:
We conduct our product tests according to a transparent and coherent evaluation system. Points such as packaging, functionality, quality, customer reviews, or the price-performance ratio are included in the final grade.
The maximum possible number of points per area is 100 points.
The following areas are evaluated:

1. The packaging
2. The first impression
3. The Practical test
4. The price-performance ratio

Furthermore, the available product reviews and customer experiences for the product are also included in the evaluation.

Important to know: 
When awarding our Qualitätssiegel.de test seal, we assess the quality of the test product not in comparison with other products available on the market, but in comparison with our standardized Qualitätssiegel.de testing standard!
Further details on the test criteria can be found here.

Below is our detailed test report on the product.

QUALITY SEAL.DE TEST REPORT

Product: Alarm chain lock
Brand: SiPRi
Tested: 12.06.2025
QS code: 66953474

1. THE PACKAGING

The alarm chain lock was located in the outer packaging made of plastic.
A further inner packaging was dispensed with.

We found the sustainability of the packaging to be good, as no more plastic was used than necessary..

The product was very well protected by the packaging.

The brand name, address, and a contact option as well as the barcode are clearly visible on the outer packaging.

2. THE FIRST IMPRESSION

Upon unpacking the product, no bad smell was detected.

The first impression of the bicycle lock is robust and thoughtful: It combines mechanical security with a deterrent 120 dB alarm, promising high protection against theft. The massive steel chain appears resilient and practical, especially in conjunction with the weatherproof finish and the protective nylon cover.

The alarm chain lock is delivered with accessories.
The following parts are included in the delivery:

• • Hex key
  • Battery

A user manual is included. An assembly guide is included.

3. THE PRACTICAL TEST

The product was designed to effectively protect bicycles, e-bikes, and e-scooters from theft with a loud alarm and a hardened steel chain. 
The alarm chain lock serves this purpose excellently.

Below we briefly explain the functionality of the test product:
The most important function of the product is the 120 dB alarm, which is triggered immediately upon tampering and deters thieves. Bike lock with alarm offers maximum security and resilient protection through its hardened steel chain.

The test report comprehensively examined the quality features of the alarm chain lock.
The alarm is very loud and is well-suited to deter potential thieves.
The chain made of hardened steel appears stable and resistant to attacks.
The alarm mechanism works reliably and responds specifically to shocks, without being unintentionally triggered by environmental influences such as wind or rain.
The weather resistance is generally good, but there is no cover for the keyhole, which is a small disadvantage.
The operation of the lock is simple and user-friendly, both when locking and changing the battery. Overall, the lock conveys a high-quality and functional impression in the tested areas.
The tested quality features meet the established requirements of quality testing.

We found particularly outstanding

• • Extremely loud 120 dB alarm for effective deterrence of thieves

  • Chain links made of 8 mm hardened steel for high resistance against cutting tools

  • Weatherproof, rust-free, and UV-resistant material for long-term protection

The product has a clear benefit and thus offers the user among other things the following advantages:

• • Nylon cover protects the vehicle frame from scratches

  • Easy operation with a key, no charging required

  • Long battery life of at least 1.5 years

  • Flexibly usable with a length of 1.2 m, suitable for bicycles, e-bikes, motorcycles, and e-scooters

  • Versatile securing options on fixed objects

The Alarm Chain Lock is very easy to use.
Our testers found no risk of injury from sharp edges or protruding parts with proper use.

4. THE PRICE-PERFORMANCE RATIO

On the trading platform Amazon, the Alarm Chain Lock of the brand SiPRi can be ordered for €89.90.

Thus, this product is in the mid-range price segment, as there are already other bike locks available starting at €26.99.

8 Customers rated the product on average with 4.4 Stars.