Bearing 6903 2RS

From Kinetic:

• Bearing ID: 17mm
• Bearing OD:  30mm
• Bearing Thickness: 7mm
• Material: Chromium Steel GCR15 (Race & Balls)/Stainless Steel SS440C (Race & Balls)
• Used On: Bontrager, Hope, Goldtec, Mavic, FSA, Zipp
• Grease: SINOPEC HTHS Bearing Grease, 30% filled
• Seal: Double-sealed 2RS