Suspension is not allowed in order to keep the cost down. Most teams will buy four new tires at the beginning of the season. At the halfway point, only the right rear will need to be replaced. Expected tire expense will average around 5-6 tires. These machines run on pump gasoline.
Teams use about a gallon of fuel per race evening.
The gasoline eliminates costly and time consuming rebuilds that are found with methanol motors. The front end components are fully adjustable. Caster, camber and wedge can easily be dialed trackside. Most people can not afford the time out of work due to a racing injury. We have all seen many scary karting accidents.