PARK TOOL - CRS-1 - CROWN RACE SETTING SYSTEM
The CRS-1 offers six inserts with to install the fork crown race. The bearing surface is spared a direct hit by using different inserts to ensure a proper fit on the race. Choose the correct insert then slide the tube over the fork tube and into the top end of the insert. Using a hammer, tap firmly on the end cap of the tube and seat the race into its proper place safely and accurately. The CRS-1 set includes one universal setting tube, three 1" inserts, and three 1-1/8" inserts. The CRS-1 will work on forks of 340mm column length or less.
For the oversized column in 1-1/4" or 1-1/2" use the CRS-15 Crown Race Setter.
SHIS terminology: The CRS-1 services in SHIS sizes 26, 27, 30.