Which bicycle lock that is a combination lock (with a code instead of keys) is the most secure device available on the market?
Of course everything can be broken, and its only a matter of time, but for which combination lock the time to crack it by a potential thief is the highest, without using tools that a thief is very unlikely to use on the street.
Considering that price and weight are not an issue. The only absolute requirement is that its a keyless lock. Is there anything that has an exceptionally good proven track record, preferably something that is being sold for quite some time already with no major vulnerabilities found?
Clarification: as a lot of people instead of applying common sense, made fun of me and spammed the answers with useless non-information, let me define terms used in the question:
The term "price is not an issue" is to be understood as "Price of the lock up to a single fee of 200 EUR (approx. 250 USD) is acceptable.
The term "weight is not an issue" is to be understood as "Mass of the lock up to 3 kg (approx. 6.6 pounds) is acceptable.