When it debuted in 1936, the Harley-Davidson Knucklehead significantly changed the course of motorcycle history.

Thunderbike wanted to create a hero version of its villain build, and as a result, this cool custom Harley Street Bob came to life.

The Screamin’ Eagle 135ci Stage IV Performance engine packs 130 horsepower and a whopping 143 lb-ft of torque.

Fortunately, the future is a long time from now, and gas-powered Harleys aren’t going to disappear anytime soon.

After looking at the study, it seems like loud pipes aren’t saying lives under these specific conditions.

This wild Harley-Davidson Street Bob was built for a computer hardware company, but it would look right at home in a sci-fi flick.

Motorcycles don’t get much wilder than this Boss Hoss trike packing a massive, all-aluminum big block V8.