Headset Bearing

This size bearing has been used as an upper bearing for Acros headsets that are designed specifically for aero cable routing, and is also know by part number AC4252.

ACB 4545 4252 SS | Stainless Steel 440C Angular Contact
In standard radial bearings, only three or four of the balls make contact during load.

This size bearings also known in the bike industry by these part numbers:
HD 1448
281819

S68808 SP | Stainless Steel 440C Angular Contact
In standard radial bearings, only three or four of the balls make contact during load. But Enduro angular contact bearings work differently.

This 1-1/2 Angular contact Bearing for Internal Headset featuring 52100 High-Carbon Chromium alloy races paired with grade 10 balls for (Cannondale Lefty).

B 543 2RS | Angular Contact
In standard radial bearings, only three or four of the balls make contact during load. But Enduro angular contact bearings work differently.

This 1-1/8 Drop-In, Internal Headset features 52100 High-Carbon Chromium alloy races paired with grade 10 Balls with 90% fill, high-pressure, water-proof grease. This primary application for this bearing size is as a direct replacement on some Pinarello bikes.

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

ACB 6808 CC SS | Stainless Steel 440C Angular Contact
In standard radial bearings, only three or four of the balls make contact during load.

This size bearing is also known in the bike industry by part number HD446K.

ACB 6806 CC SS | Stainless Steel 440C Angular Contact
In standard radial bearings, only three or four of the balls make contact during load. But Enduro angular contact bearings work differently.

This size bearings also known in the bike industry by these part numbers:
HD320K
428420
TH-373
MR055
BAA1159
MH-P09K

ACB 6805 SS | Stainless Steel 440C Angular Contact
In standard radial bearings, only three or four of the balls make contact during load.

Angular-contact headset bearing featuring anti-corrosion Black oxide/Magnetite coated 52100 High-Carbon Chromium alloy races paired with grade 10 Balls. Black Oxide coating provides an extra level of corrosion resistance and extended worry-free performance.

Angular-contact headset bearing featuring anti-corrosion Black Oxide/Magnetite coated 52100 High-Carbon Chromium alloy races paired with grade 10 Balls. Black Oxide coating provides an extra level of corrosion resistance and extended worry-free performance.

This size bearings also known in the bike industry by these part numbers:
HSS011
BAA0695K
TH-070
MR-128
MH-P16

ACB 4545 150 SS | Stainless Steel 440C Angular Contact
In standard radial bearings, only three or four of the balls make contact during load.

This size bearing is also known in the bike industry by these part numbers:
MH-P21
ACB3749
MH-P21S
TEX-3801E

ACB 4545 1375S | Stainless Steel 440C Angular Contact
In standard radial bearings, only three or four of the balls make contact during load. But Enduro angular contact bearings work differently.

This size bearing is also known in the bike industry by these part numbers:
MR136
ACB418H6

ACB 4545 136 SS | Stainless Steel 440C Angular Contact
In standard radial bearings, only three or four of the balls make contact during load. But Enduro angular contact bearings work differently.

This size bearing is also known in the bike industry by these part numbers:
MR168
970S
IS46
IS46/34
TH MR082

ACB 4545 125T SS - Angular Contact Headset Bearing
In standard radial bearings, only three or four of the balls make contact during load. But Enduro angular contact bearings work differently.

This size bearing is also known in the bike industry by these part numbers:
MR168
970S
IS46
IS46/34
TH MR082

ACB 4545 125L SS | Stainless Steel 440C Angular Contact
In standard radial bearings, only three or four of the balls make contact during load.

This size bearing is also known in the bike Industry by part number:
MH-P03H7

ACB 4545 1125T SS | Stainless Steel 440C Angular Contact
In standard radial bearings, only three or four of the balls make contact during load. But Enduro angular contact bearings work differently.

This size bearings also known in the bike industry by these part numbers:
MR042
870E
MR121
MR070
MR084
MR116
TH-870E
MH-P08

ACB 4545 1125 SS | Stainless Steel 440C Angular Contact
In standard radial bearings, only three or four of the balls make contact during load.

This size bearing is also known in the bike industry by these part numbers:
27287-1046-004
HSS0130K
TH-873E
MR-122

ACB 3645 SS | Stainless Steel 440C Angular Contact
In standard radial bearings, only three or four of the balls make contact during load. But Enduro angular contact bearings work differently.

This bearing is an angular-contact headset bearing featuring anti-corrosion Black Oxide/Magnetite coated 52100 High-Carbon Chromium alloy races paired with grade 10 Balls. Black Oxide coating provides an extra level of corrosion resistance and extended worry-free performance.

ACB 3645 3544 SS

• 20% less load capacity of stainless steel
• Slightly softer than standard 52100 chromium steel used
• Excellent alternative for use in wet conditions
• Static load: 935lbf / 4.15kN
• Weight: 20g

Angular-contact headset bearing featuring 440C stainless steel balls and races for superior corrosion protection.

This size bearing is also known in the bike industry by these part numbers:
IS42
ACB30418K
MH-P03K

• Deep groove design stainless steel alloy races
• Grade 10 balls (stainless steel)
• Fill with high pressure water proof grease
• Long life and