Alloy Inner Hub / Alloy Outer Ring, for Marine, all out Drag Racing or Circuit Racing etc. where nothing is required to be run from the inner hub or outer ring especially dry sump pumps. These balancers are particularly important to tight cornered tracks where engine revs are low and instant revs are required to accelerate out of tight turns. They are only available in Neutral Balance. Extreme weight savings with as little as 1kg total balancer weight is possible. The RPM ranges to 10,000. You can run an alternator and a crank trigger wheel.