18x30x7 mm this bearing replaces bearings marked 6903 in front hubs from DT Swiss, Giant and Bontrager, though the ID of this bearing is 1mm larger than standard 6903.
Headset bearing, 40 x 52 x 6.5 mm, (36x45o) This size bearing is also known in the bike Industry by these part numbers: HD 1404K, BAA0006K, MR-127, MR-196, MH-P25K, BAA1132, TH MR019
ShimanoShimano 9
