Fuso9130 / Derpy

After rereading the does and donts of trailer modding i dont see a mention of default trailer weights so does this means we can use 125 ton trailers?  This would only be for the fun or seeing how well we can keep ourselves rolling without failing, and of course to ONLY use it in non congested areas as t not cause problems. example,  milano, to munich to pragu. or Oslo to bergen.