The twenty cars from Stephenson arrived in December 1902. Fifteen cars were equipped with motors (even numbers 30–58) and five did not (odd numbers 101–109); these latter five cars were intended to only be used as trailing cars. Trailing cars would often be added or removed at Wheaton depending on the number of passengers. The Stephenson cars were almost identical in every respect to the Niles cars. These new cars reduced the travel time between Aurora and Chicago to one hour. The new cars also allowed the railroad to operate at faster speeds—one run from 52nd Avenue to Aurora averaged .