ENDURO ACB 6808 SS Headset Bearing - 40mm x 51mm x 6.5mm, 36x36 deg

Please note that this bearing has slightly different dimensions from the other ACB 6808 bearings we sell, it has a slightly smaller OD and has 36 degree chamfers internally and externally. It was originally spec'd by Trek on Madone and Domane bikes.

This size bearing is also known in the bike industry by these part numbers:
290413
HD 1449
S417578
MR-006 S

ACB 6808 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. When properly installed and adjusted (black seal facing in), Enduro angular contact bearings engage all of the bearing's balls to spread the force over a larger surface area, decreasing friction, minimizing wear and increasing bearing life.

• Deep groove design stainless steel alloy races
• Grade 10 balls (stainless steel)
• Fill with high pressure waterproof grease
• Long life and superior corrosion resistance
• Excellent use in wet conditions
• Two years anti-corrosion warranty
• Static load: 917lbf/ 4.08kN
• Weight: 23.36g