I just purchased a new stampede vxl 4x4, and i am looking at getting the proline trencher tires mounted on the black desperado wheels. But i noticed some are just for the front and some or for just the rear. is there a same set for both front and rear, or do i need the seperate ones? does anyone have the right part number that i need for all 4? i was thinking i needed the 1170-12 for all 4 but not quit sure. Thanks in advanced!!