Originally Posted by
Dee Hubbs
Uppers are:
Full Speed Ahead ACB Headset Bearing - 36 degrees x 45 degrees, 1 1/8", Black Seal MR122 (873E-RS),
Thickness: 6.5,
Material: Chromoly Steel,
Bearing O.D. (mm)41
Bearing I.D. (mm): 30.2
Options are:
Enduro 1-1/8" 36 x 45 degree Stainless Steel Angular Contact Bearing 30.2mm ID x 41mm OD: ACB 3645 SS-BAG
Cane Creek ZN40-Bearing 41mm Zinc Plated, BAA1130
Cane Creek Hellbender Bearing, 41mm SHIS: BAA1054
Lower is D = 40, OD = 51.8, IA = 36, OA = 45, H = 8
Cane Creek ZN40-Bearing 52mm Zinc Plated, BAA1132
Cane Creek Hellbender Bearing, 52mm SHIS, BAA1055