Personalized National Bike Month Biking Cyclist Youth T-Shirt. Biking design has person riding a bicycle with quote that says May is National Bike Month on this Youth T-Shirt - White with distressed style logo. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.