Team Losi Racing GenII Rear Hub Set Complete: All 22. All new aluminum plate rear hub. The hub base is molded composite, allowing a press bearing fit without play and minimal unspring weight compared to an aluminum hub. The aluminum plate is secured to the hub with a M3 screw and ball stud, which is vertically adjustable. Now, it is supported by aluminum from pushing or pulling out, while still threading into composite so it cannot work loose.