B543-2RS B543 397508 HD169 MAX headset replacement bearing ( 39.7x50.8x7.14mm ) repair bearing bicycle bearingSize: Inner diameter 39.7mm Outer diameter 50.8mm Thickness 7.14mmNet weight: 30gChrome steel, Rust proofPlease select the right quantity you need.Bicycle headset Angular Contact Bearing(ACB) is application for 1", 1-1/8", 1-1/4" and 1-1/2" internal & semi-intergrated headsets.Race material : chrome steel 100Cr6 / SAE52100.Ball material : chrome steel 100Cr6 / SAE52100.Cage/retainer : Nylon PA66+25%GF.Seal : rubber seal, double-sealed. Black and blue radomeLubrication : Mobil XHP-222 or HTHS #2.MH-P03 : 30.15416.5 mm, 45°/45°, double-sealed, black, red or black seal.MH-P03K : 30.15416.5 mm, 36°/45°, double-sealed, blue seal, it is the same size with TH industries #073 bearing.MH-P08 : 30.1541.86.5 mm, 45°/45°, double-sealed, black or red seal.MH-P08H7 : 30.1541.87 mm, 45°/45°, double-sealed, red seal.MH-P08H8 : 30.541.88 mm, 45°/45°, single-sealed, black or red seal.MH-P08F : 30.541.88 mm, 45°/45°, single-sealed, black or red seal, inner race with small lip.MH-P04 : 30.15396.5 mm, 45°/45°, double-sealed, black seal.MH-P09K : 27.15386.5 mm, 36°/45°, double-sealed, black seal.MH-P16 : 40527 mm, 45°/45°, double-sealed, red seal.MH-P16H8 : 40528 mm, 45°/45°, double-sealed, red seal.MH-P17 : 34.146.87 mm, 45°/45°, double-sealed, black seal.MH-P21 : 37497 mm, 45°/45°, double-sealed, black seal.MH-P22 : 34.146.97 mm, 45°/45°, double-sealed, black seal.ACB518K : 4051.88 mm, 36°/45°, single-sealed, black seal.If you do not find the right bearing you need from above items, pls feel free to contact us.window.adminAccountId=225385796.Item specifics:Material: SteelModel number: B543-2RS B543 397508 HD169Torque capacity: 1Surface roughness: Ra 0.05Coatings: Chrome steel