Soapbox vehicle: custom-built, non-motorized; weight limit 100 kg (220 lb); maximum dimensions 1.8 m × 1.8 m × 3 m (height × width × length); maximum 4 wheels; Steering mechanism required (mechanical, hand or foot operated); Functional brakes required (hand-lever or foot-pedal)
Why people argue about this
People think that the weight limit of 100 kg is too lenient, allowing overly light vehicles that can be unstable and unsafe, but actually, the rule aims to balance safety with practicality, ensuring racers have enough mass for traction without being so heavy they're prone to flipping over.
