Park Tool Crown Race Setting System For 1.5" And 1-1/8"Information: The CRS 15. 2 uses two different insert rings to install bearing races on the 1. 5" and 1 1 4" forks. The bearing surface is spared a direct hit by using an aluminum inserts. Using a hammer, tap firmly on the end cap of the tube and seat the race into its proper place safely and accurately. Included extension allows work on fork steering tubes up to 425mm. Features: SHIS terminology: The CRS 15 services crown races in SHIS 33 and 40.