New from Schumacher for the Mi4 are these shorter and stiffer new wishbones. The new design enables the car to have more corner speed and traction under almost all track conditions. The overall car width is maintained through the use of washers at the pivot block. Available in both Carbon Fibre material for the high end racer and Medium Flex material for improved impact absorption. Also available are these Xtra Flex 4 degree front caster blocks that will give more steering compared to the Medium Flex ones released previously.