Mizuno MP 55 (is Mizuno crazy?!?)Equipment

mpo55The MP 55 was the first generation of the rubber tired variant of electric multiple units used on Paris's Métro system. The trains were manufactured by a consortium between Renault,Mizuno MP-55 Yoro Craft Irons – In Japan Mizuno offers the MP-55 instead of the MP-25 why? I don’t know but I do know after hitting the MP-55’s that they are indeed special