Headset bearing, 35x44x5.5 mm (36x45o) This size bearing is also known in the bike Industry by these part numbers: ACB3344H6, AC3344

Headset bearing, 30.2x41x6.5 mm (36x45o). This size bearing is also known in the bike Industry by these part numbers: 27287-1046-004, HSS0130K, TH-873E, MR-122.

Headset bearing, 30.15x41x7 mm (45x45o) This size bearing is also known in the bike Industry by part number: MH-P03H7

Headset bearing, 34.1x46x67 mm (45x45o) This size bearing is also known in the bike Industry by these part numbers: MR168, 970S, IS46, IS46/34, TH MR082

Headset bearing, 32.75x41.75x6 mm (45x45o). This size bearing is also known in the bike Industry by these part numbers: MR136, ACB418H6