A good choice for riders who want a lightweight, easy-to-carry lock for short stops and low-theft-risk parking rather than high-security city protection.
The ZEFAL K-Traz C6 provides basic security for low-theft-risk situations. Its flexible twisted steel wire has a tough vinyl cover, while the coiled design makes it convenient to carry when you are commuting, stopping at a café or leaving your bike briefly at a car rack.
The key-operated locking system includes two keys, and Z Safe DS uses a springless design to help prevent the bolt from blocking during operation. The included mounting clip attaches to compatible tubes up to 30 mm in diameter, with adjustable hardware for down tubes from 22 to 30 mm.
At 410 g, the K-Traz C6 is an easy accessory to keep on the bike. It is best suited to short-term or overnight parking where theft risk is very low; for busier or higher-risk locations, pair it with a stronger lock such as a U-lock. Keep the mechanism clean and cared for, as moisture, dust and cold can affect lock operation.
12 mm coiled cable
The flexible twisted steel wire gives you convenient reach for securing the bike to a suitable fixed point, while the vinyl cover helps protect the cable and frame contact points.
Basic security level 6
Designed for areas with a very low risk of theft and short-term or overnight parking.
Key-operated locking
A familiar key system is simple to use, with two keys included.
Z Safe DS system
The springless locking design helps prevent the bolt from blocking, supporting smoother everyday operation.
Quick frame mounting
The included mounting clip provides a tidy way to carry the lock on compatible frame tubing.
Adjustable fit
The mounting hardware is adjustable for down tubes from 22 to 30 mm, and the mount suits tubes up to 30 mm in diameter.
Easy to carry
At 410 g, it adds practical security without the bulk of a heavier high-security lock.
General
Materials & construction
Dimensions & weight
Compatibility & mounting
Locking system
Use & care
Z Safe DS
Our patented springless locking system helps prevent the bolt from blocking, making the lock easier to operate.
Quick mounting
The included mounting clip lets you attach the lock quickly to a compatible frame tube up to 30 mm in diameter.
French cycling accessories since 1880.
ZEFAL is a French cycling accessories brand with roots dating back to 1880. Its history traces back to E. Sclaverand, the inventor of the Presta valve, and the company later developed through Poutrait-Morin before adopting the ZEFAL name in 1998.
Today ZEFAL is based in Jargeau, Loiret, and focuses on accessories across road, MTB, gravel, urban and adventure riding. The brand is known for long-running product categories such as pumps, bottles, bottle cages and maintenance accessories, with a strong emphasis on French industrial know-how and ongoing local manufacturing.
