The Tri Pacer was the final version of a line of post-war Piper high wingers which included the Clipper and PA-20 Pacer. With fixed tricycle gear, the PA-20 became the Tri-Pacer and was very popular in the 1960s with 135 hp and 160 hp engines and as the 150 hp Caribbean. The tube and fabric Tri-Pacer has a separate rear port side door for passengers.