You know, a lot of people see that as a negative and talk about how more surface area of a larger min journal creates more friction. I don't buy that, because bearings and journals have clearances, with a film of oil between, so friction is minimal. In fact, I see the larger main journal as a plus, since there is more material and strength. But that's only my opinion.
I've never seen any races won or lost as a direct result from journal diameter.
