Auto World's new 4Gear chassis is based on a classic sxtended "pancake" design. It features an extra gear on its lengthened power transfer plate. The extended wheelbase and narrowed rear end fitted with gigantic dragster-inspired wheels make it perfect for custom applications and totally wild specialty vehicles! And that's not all... Flip the chassis over and you'll find two neodymium traction magnets to make these dynamite racers grip the track for super high speed racing excitement! The S'Cool Bus Yellow iWheels was produced in limited quantities.