Bike or Biker

"Complete the BMX or NRG challenge."

- In-game description

Bike or Biker is an achievement/trophy in Grand Theft Auto: San Andreas.

Acquisition
The BMX challenge can be found in Glen Park, and is started when Carl Johnson gets on the BMX next to the skate ramp. The NRG challenge can be found inside an empty ship yard in Easter Basin, San Fierro, and is started when CJ gets on the NRG-500 located on the upper-level.