The 7ft bar is suitable for use with power racks olympic benches and other free weight use static lifts only the 5ft and 6ft olympic bars are too narrow for this use these 5 6 and 7ft olympic bars have a 30mm diameter shaft the load rating is a static load only and is against bar failure not minor bending which would be permanent as the bars as they are not made from spring steel key features of the gym gear premium olympic bar this product is extremely durable made from steel to preve