Foldable stroller frame with an auto-extending wheel distance adjustment

A foldable stroller frame with an auto-extending wheel distance adjustment, comprising:

• a front support rack connected with at least a front wheel set at a lower end of the front support rack;
• a rear support rack having an upper end, an upper section near to the upper end, a lower end, a pair of first sliding-and-pivoting connectors pivoted at the upper section, and a pair of rear wheel sets connected to said lower end of the rear support rack;
• wherein the pair of first sliding-and-pivoting connectors are movable along the front support rack that permits the pair of rear wheel sets moving toward the front wheel set for shorting a distance between the pair of rear wheel sets and the front wheel set, and leaving the front wheel set for extending said distance;
• a pushing rack, having an upper pushing section, a lower pushing section, and a pivot connector mounted on a lower portion of the upper pushing section for pivotally connecting an upper distal end of the lower pushing section to the lower portion of the upper pushing section;
• a pair of power transmitting rods, for driving the rear support rack moving relatively to the front support rack by rotating the upper pushing section of the pushing rack, each of the pair of power transmitting rods having a lower end pivotally connected to the rear support rack, and an upper end pivotally connected to a distal end of the upper pushing section of the pushing rack.