Wheels Manufacturing BB30 to Shimano Bottom Bracket ABEC-3 Bearings Black CupsMachined aluminum shell threads together for precise bearing alignment and frame fit, reducing bottom bracket creaking and premature bearing wear. ABEC 3 sealed bearings Grade 10 chromium steel balls, 52100 High Carbon Chromium Alloy Races Replaceable Enduro bearings Made in the USA Item Specifications BB Shell Width (mm) 68 BB Shell Width (mm) 73 BB Frame Interface BB30 Bottom Bracket Shell I. D. 42 Defined Color Black Spindle Interface Type FSA
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Wheels Manufacturing BB30 to Shimano Bottom Bracket ABEC-3 Bearings Black Cups