Zefal K-Traz U20

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Product details

The ZEFAL K-TRAZ U20S is a compact U-lock with a maximum security rating of 20/20. The body and the edges are rubberized, and the impact protection is fully coated with a soft layer.

  • Certification: Class SRA, which guarantees that the anti-theft devices are stable, durable, and meet safety standards.
  • Key replacement in case of loss with a unique serial number (3 keys included).
  • Material: hardened steel.
  • Dimensions: 185 x 305 x 48 mm, cross-section: Ø 18 mm.
  • Weight: 2550 g.
  • Model name: ZEFAL K-TRAZ U20.
  • Available for pre-order.
  • Category: 20.
  • Segment: Accessories.

Key specifications

Lock type
U-lock
Thickness
18 mm
Closing mechanism
Key
Weight
2550 g

General information

Item number
60594562
Manufacturer
Zefal
Category
Bike locks
Manufacturer No.
726970
Release date
28.7.2025

Colour

Colour
Black
Exact colour description
Black

Material

Material group
Metal
Material
Hardens steel

Lock properties

Lock type
U-lock
Thickness
18 mm
Closing mechanism
Key

Scope of delivery

Scope of delivery
3 keys

Product dimensions

Length
30.50 cm
Width
4.80 cm
Height
18.50 cm
Weight
2550 g

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «Bike locks» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • Zefal
    Not enough data
  • 1.Burg Wächter
    0.2 %
  • 2.BBB
    0.3 %
  • 2.Rockbros
    0.3 %
  • 4.Kryptonite
    0.4 %

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: Digitec Galaxus
  • Zefal
    Not enough data
  • 1.Abus
    0 days
  • 1.AXA
    0 days
  • 1.Fischer
    0 days
  • 1.HipLok
    0 days

Return rate

How often is a product of this brand in the «Bike locks» category returned?

Source: Digitec Galaxus
  • Zefal
    Not enough data
  • 1.Hama
    0.6 %
  • 2.Puky
    0.8 %
  • 3.Cbx
    1 %
  • 3.Hudora
    1 %
Source: Digitec Galaxus

Translation: machine translated
Overall ratingWithout rating0/100
Without ratingNo rating
ElektroRad Logo
ElektroRadTest BügelschlösserReleaseMarch 2026

The steel of the shackle is quite tough and withstood the flex for 40 seconds. The saw penetrated the lock body, but not deeply. The holder consists of straps, the lock can be transported very firmly on the bike without damaging the frame.

Go to complete test report
Without ratingNo rating
ElektroRad Logo
ElektroRadSingle testReleaseOctober 2025

Solid U-lock with quite a high weight - but correspondingly high theft protection. In addition, everyday handling and the option of reordering keys if the three supplied are not sufficient are impressive.