The choice to get tattoos and wear leather jackets among bikers is not universal, and it ultimately comes down to personal preference. However, there are some historical and cultural reasons why these two aspects have become associated with the biker community.

First, many bikers see tattoos as a way to express their individuality and show their commitment to the biker lifestyle. Tattoos can also be used to signify membership in a particular biker gang or club, with specific designs and symbols representing different groups.

Second, leather jackets are a practical choice for bikers because they provide protection from the wind, sun, and road debris. Additionally, leather jackets have been associated with rebellious subcultures throughout history, and many bikers embrace this image as a way to stand out from mainstream society.