59mm ECS ball-bearing drive shaft made from world-renowned HUDY Spring Steel. This race-quality drive shaft is an extra part for #305307 ECS BB (Ball-Bearing) Drive Shaft 59mm - HUDY Spring Steel????. Set of 2. The ECS BB (Ball-Bearing) driveshafts offer a substantial performance gain within the standard blade-type driveshafts. The friction involving the driveshaft plus the outdrive is paid down, which helps you to provide a smoother maneuvering feel, specially on fast way modifications, including chicanes. The reduced friction helps you to increase cornering rates. The 59mm shafts are best suited to get more available and moving track designs. They are going to provide somewhat less initial steering, but better steering in the corner, plus on power. Maintenance of the bearing driveshafts is important, but very simple. Develop them as you would your normal ECS driveshafts, but with these addition; we suggest utilising the Hudy Joint Grease (106213) between the small bearings as well as the outdrives, for a prolonged life associated with parts.