58mm ECS ball-bearing drive shaft produced from world-renowned HUDY Spring metal. This race-quality drive shaft is an additional component for #305306 ECS BB (Ball-Bearing) Drive Shaft 58mm - HUDY Spring steel????. handful of 2. The ECS BB (Ball-Bearing) driveshafts provide an important performance gain within the standard blade-type driveshafts. The friction between driveshaft as the outdrive is paid off, that allows you to give a smoother maneuvering feel, especially on fast method changes, especially chicanes. The paid down friction enables you to increase cornering prices. Maintenance among these bearing driveshafts is necessary, but easy. Develop them when you would your normal ECS driveshafts, but with another addition; we recommend utilising the Hudy Joint Grease (106213) between your small bearings along with the outdrives, for a protracted life of this components