The Atlas® WB-41 is very a simple, yet sophisticated wheel balancer. Each electrical component part is virtually " plug and play " so repair is easy when it is time to replace parts. The Atlas® WB-41 wheel balancer balances wheels that weigh up to 130 LB. Many balancers claim that they have 150 lb wheel capacity. There is a BIG difference between the shaft being able to support a 150 lb wheel assembly and the balancer being able to accurately balance the 150 lb. wheel assembly.