Abstract: A vehicle for overcoming an obstacle that comprises a carriage and a translator. The translator comprises a translator member rotatably connected to the carriage and at least three wheels rotatably connected to the translator member. The three wheels have a coplanar, same orientation and substantially equilaterally triangular relation to each other for reducing resistance from the obstacle to the overcoming vehicle. A pulling force by the operator rotates the translator member and the third wheel joins the second wheel as both are biased against the same vertical second surface of the first stair. A still further pulling force by the operator rotates the translator member more so that the third wheel rolls over a corner of the first stair onto a horizontal third surface of the first stair while the second wheel still contacts the vertical second surface of the first stair.