Enduro ACB 4545150SSM 1-1/2 SS Angular Headset Bearing 34x51.8x7mm 45x45

Engineered with 440C stainless steel construction throughout, this angular-contact headset bearing delivers exceptional resistance to corrosion and oxidation. The precision-ground races and balls ensure smooth, reliable performance in demanding conditions, making it ideal for high-performance applications requiring durability and longevity.

Designed for framesets with compact lower bearing seats, this bearing matches the ACB 4545 150 specifications while incorporating a slightly reduced 51.8mm outer diameter. This precision sizing ensures proper fit and optimal performance in frames requiring tighter bearing tolerances without compromising load capacity or durability. 

This size bearing is also known in the bike Industry by these part numbers:

• HSS011
• BAA0695K
• TH-070
• MR-128
• MH-P16

Not all stainless steel is created equal.

Built with 440C stainless steel balls and races, this bearing delivers superior corrosion resistance and extended service life in challenging environments. The high-carbon alloy offers exceptional strength and wear resistance compared to standard 440-series alternatives, while LLB-type seals and Almagard 3752 grease provide comprehensive waterproofing against moisture, perspiration, and sports drink exposure. Though marginally softer than chromium steel, the stainless construction excels in wet conditions where corrosion protection is paramount. Backed by a lifetime warranty, these bearings match the quality found in premium headset manufacturers.

This angular-contact bearing represents Enduro's premium stainless steel offering, engineered with 440C races and oversized balls for optimal load distribution. The dual-lip seal design incorporates a micro-groove labyrinth geometry, while 90% fill of high-pressure waterproof grease delivers comprehensive protection against moisture and environmental degradation. The evenly-engaged ball configuration spreads forces across a larger contact surface, significantly reducing wear rates and extending bearing longevity in demanding applications.

SPECIFICATIONS 

• Static load - 977lbf / 4.34kN
• Weight - 24g