Super B Premium TB-1939 Crown Race Setting System 1 1/4" and 1.5"
Specifically-sized inserts makes setting the crown race on the fork more efficient. Select the appropriate insert and place it on the crown race. Use a hammer, to strike a blow to the end cap this then seats the race into its place properly and precisely.
SB1939 Includes one setting tube, 1 1-1/2" insert and 1 1-1/4" insert for installing the crown race used on most 1-1/2" and 1-1/4" headsets.