Testicular torsion is one of the most common surgical emergencies in males. Bicycling is a possible and frequent cause of a variety of urologicaldisorders including testicular torsion. The data regarding the association between testicular torsion and bicycling are limited to some case reports inyoung boys. Here, we report a case of testicular torsion in an adult, which occurred shortly after excessive, long-distance bicycle riding.