Auxiliary tire for bike has main tire with concave trough, and auxiliary tire placed in trough, and having colored tread pattern covering its superficial ring

摘要

Outer annular tread of main tire (10) has concave trough (11) with prominent line (12) formed around central surface of main tire. Outer non-slip tread pattern (13) is formed on both sides of prominent line. Auxiliary tire (20), made from elastic rubber, is inserted in concave trough. Tread pattern (23), covering superficial ring of auxiliary tire, can be available in large range of colors. Inner trough (21) is formed inside auxiliary tire, and corresponds to prominent line. Inner non-slip tread pattern (22) corresponds to outer non-slip tread pattern.