The invention relates to novel antibody drug conjugates (ADCs) having improved properties, active metabolites of said ADCs and methods for the production thereof. The present invention further relates to the use of said conjugates for the treatment and/or prevention of diseases and to the use of said conjugates for the production of medicaments for the treatment and/or prevention of diseases, in particular hyperproliferative and/or angiogenic diseases such as, for example, cancer diseases.