Disc locks are great for use when a lock and chain cannot be used, such as on journeys. Small and light enough to store in luggage or underseat, disc locks will make it more difficult for would be thieves to wheel a bike away. Use as additional security also whenever the bike is chained.
Can also be used with chain.
The Ultra Strong Magnum U-Lock features a 16mm shackle with a high tech, pick resistant double locking mechanism. This dual use lock comes with a carry bracket making it compatible with bicycle use.