Is there a sticker on a car that states the maximum tongue weight of a trailer that it can handle? If stopped how would the DVSA or police determine if you are exceeding the tongue weight as I cannot find any specific legislation? We do not have an issue as our vehicle can handle up to 175kg nose weight of a trailer. I am asking on behalf of some one else and it seems that the main concern would be your insurance company if they bother to do an in-depth check.