1 1/8 inch, AL 6061 crown race.
-Upper&Lower bearing cup insertion: 34mm.
-Bearing option
Fully Stainless Steel with TiN finish, S/S balls bearing,
6/4 Titanium-DLC finished with ceramic ball bearing.
Weight: S/S bearing- 65g(w/o cap and bolt)
Ceramic bearing- 40g(w/o cap and bolt)