Enduro 1.5" 36 x 36 Degree Stainless Steel Angular Contact Bearing 40mm ID x 51mm OD x 6.5mm $34,00 favorite_border Enduro ABI Headset Bearing for new builds or replacements. Thickness: 6.5 Cartridge Bearing Angle: 36x36 Bearing O.D. (mm): 51 Bearing Type: Cartridge Bearing I.D. (mm): 40 See at Unlimitedbiking See all Component