Zefal K-Traz U20 Lock ZIPPMARCH The rim's reduced inertia means

The rim's reduced inertia means instant acceleration and perfect power transfer

The extreme chain angle opens gaps between plates to allow the lube to better work into the chain

Disc brake wheelsets only

2-piece block – blends strength of steel with light weight of alloy

S     25                     19

Zefal K-Traz U20 Lock ZIPPMARCH The rim's reduced inertia meansThe Zfal K Traz U20 is the most powerful U lock in the Zfal range. It is SRA certified, a certification and certification body set up by a group of insurers that guarantees technical and mechanical characteristics that meet the highest security standards and tests. With a maximum security rating of 20, this lock is suitable for people who regularly travel around the city and need to lock their bike, e bike, cargo bike or longtail bike in unguarded