system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can three-wheeled vehicles such as Spyders be accredited as road-safe when 3-wheeled ATVs were discontinued for safety concerns?
gpt
Because a Spyder has different weight distribution that creates a low center of gravity and makes it considerably more stable, and Spyders (and the other similar 3-wheeled vehicles) are not designed for "all terrain" (ie, off-road, on rough ground, rocks, deep mud, etc) use, they're designed for highway use on proper roads. The problem with 3-wheeled ATVs was weight distribution that resulted in a high and easily overbalanced center of gravity, combined with their usage on all kids of rough and/or unstable terrain.