During testing

Upgrade or replace your Promoto-MX's hubs with this blue-anodized aluminum set

Losi Racing LOS233016 Front Shock Set Complete 22S

Front axle housing

but since the resistance is fixed

Parma 1240 1/10 Parma '56 Muscle Baja Short Course Drag Clear Body 2.9 Tires During testingParma 1240 1 10 Parma '56 Muscle Baja Short Course Drag Clear Body PARMA PSE . 040" thick clear body w window masks. Fits most Short Course Trucks, Drag Chassis. Shown on the original Traxxas Slash 2WD truck chassis. Also fits 4WD models. Front body mounts may need modification. Place clear body over existing mounts on chassis to fit and mark body post holes before painting. Body measures: 13" WB, 11. 75" Width, 21. 5" Long and 5. 75" High.