The shims are not between the pivot tube and seal. They are between the swing arm and seal. If the pivot tube extends too far out of the swing arm yiou will have to much side to side play. The shims fill in this excess.
The pivot tube only sticks out a few thousands to let the swing arm pivot around the pivot tube,
Leo
The pivot tube only sticks out a few thousands to let the swing arm pivot around the pivot tube,
Leo