Bikers are a subculture revolving around riding motorcycles, and the lifestyle/culture associated with it. The biker aesthetic is not quite the bike itself, or anyone who rides one, but a specific type of style and attitude that is associated with it. The biker aesthetic is an image of toughness, roughness, sex appeal, and danger.

Though motorcycles have been around since the 1800s (commercially, since the 1900s),  'biker culture' as we know it now has its roots in post-WWII. With the men coming back from service, motorcycle advertising changed to reflect a masculine aesthetic, with women being pushed out of the picture, or included only as passengers for sex appeal. This push was part of the post-war movement for men to return to their prior 'masculine' roles, with women returning to their 'housewife' duties.

Although the reach of the aesthetic has spread across the world, it's mainly associated with America, Japan, and Britain. The aesthetics vary by region, though all share common aesthetics, such as the tough and ‘criminal’ association.

Biker fashion changes culturally, but most incorporate leather, blacks and reds, studs, chains, jeans/denim, 'punk' styles, and 'edgy' styles. For women, there is usually an emphasis on sex appeal, while men emphasize masculinity and intimidation.

Metal, hard rock, and punk music is usually associated with bikers.