Balhoofdlager ACB 4545 1375 37x49x7 45/45

ACB 4545 1375S - 1-3/8" 440C Stainless Steel Angular Contact Headset Bearing

Upgrade your bike with the high-performance ACB 4545 1375S angular contact headset bearing, crafted from durable 440C stainless steel for exceptional corrosion resistance and longevity. This precision bearing (37mm x 49mm x 7mm; 45° x 45°) features high-quality stainless steel balls and races, ensuring reliable performance even in challenging conditions. Known in the cycling industry by part numbers such as MH-P21, ACB3749, MH-P21S, and TEX-3801E, this bearing is ideal for demanding environments.

Enduro exclusively uses 440C stainless steel for its superior strength, hardness, and wear resistance, making it the top choice for long-lasting, corrosion-proof bicycle components. Although stainless steel has about 20% less load capacity and is slightly softer than traditional 52100 chromium steel, it excels in wet conditions, frequent washing, or environments where sweat causes corrosion. These bearings are sealed with LLB-type seals and lubricated with CRC Marine grease for added water resistance.

All Enduro stainless headset bearings are backed by a limited lifetime warranty and are comparable to those used by many premium headset brands, including models with a 110-year warranty. Designed with large balls and dual-lip labyrinth seals, they provide maximum protection against moisture and debris, ensuring smooth operation over time. The Angular Contact (A/C) design distributes load evenly across all balls, reducing wear and extending bearing life.

• Static load: 820 lbf / 3.64 kN
• Weight: 28.4 g