59mm ECS ball-bearing drive shaft made out of world-renowned HUDY Spring metal. This race-quality drive shaft is a spare component for #305307 ECS BB (Ball-Bearing) Drive Shaft 59mm - HUDY Spring metal????. Group of 2. The ECS BB (Ball-Bearing) driveshafts provide a significant performance gain on the standard blade-type driveshafts. The friction between your driveshaft and outdrive is paid off, which actually really helps to offer a smoother management feel, specifically on fast way changes, like chicanes. The paid off friction really helps to increase cornering rates. The 59mm shafts are suitable to get more available and moving track designs. They will provide slightly less initial steering, but better steering in component, alongside on energy. Upkeep regarding the bearing driveshafts is essential, but very simple. Develop them while you would your normal ECS driveshafts, but with these addition; we suggest utilising the Hudy Joint Grease (106213) in the middle of your little bearings as well as the outdrives, for a protracted life linked to the parts.