your an idiot when you say its got nothing to do with the wieght... it does matter about the size and weight!! are you telling me that your car will go the same when your on your own driving and then you'e got 4 other people in the car??? no!! ofcourse its gonna lag more with more weight everybody knows that...if the sportivo was not able to land lift 1st-2nd TOYOTA would definately not have brought it out in production... when your wheels are heavier its not good... You want all the spinning or rotating parts of the car and the motor to be as light as possible.. flywheel, pistons, pulleys and many more