ABEC-3 DT Swiss | XERO Wheel Hub Bearing 18307-LBLU, 18307-2RS, MR18307-LLB Part Code: 18307-LBLU Bearing ID: 18.00 mm Bearing OD: 30.00 mm Outer Ring Thickness: 7.00 mm Inner Ring Thickness: 7.00 mm Precision: ABEC-3 / P6 Material: Chromium Steel GCR15 / 100CR6 (Races & Balls) Lubrication: Kyodo Yushi SUPER N Bearing Grease Cage: Steel-cage Seal: Dual-sealed 2RS Treatment: Black Oxide coated is available after request Used on: Wheel front/rear hub Interchange with: 18307-2RS, 18307-LLB *** NOTES: When you install this bearing in your wheel hub, orange LU seal facing outwards ***