Xray have released all-new hard XB9 suspension arms moulded from a new blend of their own proprietary composite material. After extensive testing of dozens of different hard composite mixtures, the factory team identified this new blend as the choice for mass production. The new hard suspension arms are specifically designed to be used in extremely hot conditions. The new harder composite will reduce flex and deformation in these extreme heat conditions, however, due to the reduced flex, they are also less resistant to extreme impacts. The new suspension arms are also longer providing increased stability.