Bingo! the award goes to wschruba. As the rolling elements radius grows so too does the load capacity, as I was told the increase is geometric with radius.


So take a look at most all current bearing designs and note the tiny rolling elements sizes. Driven by the need for aero or integration bearings are becoming a secondary aspect, no longer is long bearing life the positive it use to be. Now it's about how little the bearing impacts other design aspects.


One piece cranks were made in an era when tolerances were vastly looser, bikes cost far more of one's yearly income and repairing stuff was wideplace. They filled their goals well. Andy