In Stiftung Warentest's bicycle lock test, 81 models compete. Almost a third failed. Fortunately, there are also good locks for little money.
Trelock U4 Plus
23 cmOnly 1 piece in stock at supplier
Product details
The U4 with security level 4 is particularly comfortable to use thanks to its automatic locking mechanism and reversible key. A dust cover protects the IN-X inner cylinder. Visually, the U4 Plus also impresses, as it features the new and elegant product design that all Trelock innovations showcase.
- Lock cylinder: Cylinder lock, In-X
- Details:
- Lock approval: Finanssialan (FI), SBSC (SE), Sold Secure Silver (UK)
- Theft protection: medium security
- Type: U-lock
- Locking mechanism: key lock
- Security level: 4
- Key: double-sided inner groove
- Mounting: holder can be flexibly mounted on the frame
U-lock dimensions:
- Shackle height: 230 mm
- Shackle diameter: 14 mm.
Lock type | U-Lock |
Thickness | 14 mm |
Closing mechanism | Key |
Weight | 880 g |
Item number | 13632609 |
Manufacturer | Trelock |
Category | Bike locks |
Manufacturer no. | 8005196 |
Release date | 22/8/2020 |
Colour | Black |
Exact colour description | Black |
Material group | Metal |
Material | Steel |
Lock type | U-Lock |
Locking circumference | 23 cm |
Thickness | 14 mm |
Security level | 4 |
Closing mechanism | Key |
Country of origin | France |
CO₂ emissions | 7,97 kg |
Climate contribution | EUR 0,20 |
Scope of delivery | 2 keys |
Length | 23 cm |
Inside temple dimensions Length | 23 cm |
Weight | 880 g |
Length | 30 cm |
Width | 16 cm |
Height | 5 cm |
Weight | 1.01 kg |
30-day right of return
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Reviews & Ratings
Statutory warranty score
How often does a product of this brand in the «Bike locks» category have a defect within the first 24 months?
Source: Galaxus- 11.Puky0,8 %
- 11.Segway-Ninebot0,8 %
- 11.Trelock0,8 %
- 14.Hama0,9 %
- 14.M-Wave0,9 %
Statutory warranty case duration
How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?
Source: Galaxus- TrelockNot enough data
- 1.Abus0 days
- 1.Fischer0 days
- 1.HipLok0 days
- 1.Kryptonite0 days
Return rate
How often is a product of this brand in the «Bike locks» category returned?
Source: Galaxus- 18.Relaxdays3,9 %
- 19.Onguard4 %
- 20.Trelock4,2 %
- 21.Forever4,4 %
- 22.Kryptonite5,3 %

The Trelock is very secure when it comes to theft protection. The slim accessories and weight cost a few points. All in all, a convincing price/performance winner.