In what they term a "strategic partnership," bearing maker SKF will provide "critical components" to Protean Electric for the latter's in-wheel electric drive technology. The five-year agreement also calls for the companies to "look at additional new areas of collaboration for the hybrid and electric vehicle market." The initial focus of the partnership will be on a custom-designed SKF wheel bearing system with integrated sealing and sensors developed specifically for Protean. The bearing system is engineered to optimize performance of the in-wheel motor, which operates in a harsh environment. Protean claims its technology offers superior regenerative braking performance—energy recovery of up to 85%, among other attributes.