The Concrete Sidewinders are an Amerindian go-gang active in the Sioux Nation.
The Concrete Sidewinders are the biggest go-gang in the Sioux Nation, over a 100 strong. It's a gang of speed freaks, who tour the NAN motorcycle racing circuit and often win. Unlike most Amerindian gangs, it accepts recruits from any tribe as long as they can ride a motorcycle and go fast. The gang also accepts women, Anglos, and metahumans. It's turf is the I-80 from Cheyenne's east side to west of Ogallala. When it comes to motorists, they like to count "coup" by using paintball guns on their vehicles.
They will kill any competitors that challenges their control of the I-80. While many are weekend warriors who like to make trouble by harassing motorists and smuggling small packages, the core members are involved in murder-for-hire, kidnapping, drug trafficking, and gun smuggling. It has within its ranks ex-military from the Sioux Defense Force.