How thick is the trailer wire rope

If steel wire rope is used for car trailer rope, 7-8mm thick rope is enough.
The 8mm hemp core wire rope of ordinary specification is generally 6X37+FC-8.7 or du6X19+FC-7.7. According to the formula, the minimum breaking force of 8.7 wire rope is 37.3KN, that is, 3806kg can be broken, and the minimum breaking force of 7.7 wire rope is 30.4KN, that is, 3102kg can be broken.