https://all4bikes.be/shop/images/enduro/enduro lager 1116x15x932 abec 3 headset b-541 2rs max - b5412rsmax.jpg
MAX bearings are filled completely with high precision Grade 10 balls for maximum load capacity. No retainer means these bearings have 40 percent more capacity. The balls must be filled by hand, through a precision slot ground into the inner and outer race.