Planetary gear train of automatic transmission for vehicle

A planetary gear train of an automatic transmission for a vehicle, comprising:

• a first planetary gear set including first, second, and third rotation elements;
• a second planetary gear set including fourth, fifth, and sixth rotation elements;
• a third planetary gear set including seventh, eighth, and ninth rotation elements;
• a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements;
• an input shaft, the first, second, and third planetary gear sets being disposed at a radial outer of the input shaft;
• an output shaft disposed in parallel to the input shaft, the fourth planetary gear set being disposed at a radial outer of the outer shaft;
• a first shaft directly connected to the first rotation element;
• a second shaft directly connecting the second rotation element to the fourth rotation element and being connected to the input shaft;
• a third shaft directly connected to the third rotation element;
• a fourth shaft directly connected to the fifth rotation element;
• a fifth shaft directly connecting the sixth rotation element to the eighth rotation element;
• a sixth shaft directly connected to the seventh rotation element;
• a seventh shaft directly connected to the ninth rotation element;
• an eighth shaft directly connected to the tenth rotation element, the eighth shaft connected to one of the third and seventh shafts through a first transfer gear;
• a ninth shaft directly connected to the eleventh rotation element and the output shaft;
• and
• a tenth shaft directly connected to the twelfth rotation element, the tenth shaft connected to the other of the third and seventh shafts through a second transfer gear.