This allows for better front wheel traction when cornering. The Spyder has traction and stability control, and antilock brakes. Wheels and tires were changed for improved traction and handling. Most vehicles had metal wheels and less than excellent traction. Hydraulic elevators are usually slower than traction elevators. It also has permanent all-wheel drive using the Haldex Traction system. Many people find the torque distribution on Haldex Traction systems confusing. A computer controlled progressively locking central differential ensured traction was retained in tough conditions. Steer, traction, and trailer tyres are marketed. Tires called R-Compounds are commonly used in motorsports for high amounts of traction. Early road trains consisted of traction engines pulling multiple wagons. Also used are technologies not allowed in F1 such as active aerodynamics and traction control. Also new was the standardization of ABS and a new electronic traction control system. The Discovery 3 was fitted with multiple electronic traction control systems. VDC incorporates a form of traction control.