Originally Posted by
ThermionicScott
The conventional wisdom is to put in enough to fill the race, then pull one out.
Ding ding ding... We have a winner.
I was taught to use enough bearings to fit snugly around the edge of the cup, and then remove one for the proper running clearance.
As a memory check, I referred to the headset overhaul section of
Glenn's Complete Bicycle Manual, 1973, to be sure.
Originally Posted by Glenn's
Check to be sure the bearings fit snugly and evenly, with just enough room for one more (for proper running clearance), as indicated in the illustration.