Bearing Enduro Bearings ACB 4545 125T Stainless Steel 1-1/8"

ACB 4545 125L SS – 1-1/4 440C stainless steel angular-contact headset bearing (34.1mm x 46mm x 7mm: 45x45deg). In the bicycle industry, this bearing size is also known by these codes: MR168, 970S, IS46, IS46/34, TH MR082.

The bearing has 440C stainless steel balls and races to help protect against corrosion. Enduro uses 440C for its high strength, hardness and wear resistance. Its high carbon content means it requires special heat treatment and cryogenic treatment to achieve these properties. Although it is slightly softer than the standard 52100 chromium steel used in most Enduro bearings, 440C stainless steel is suitable for wet conditions and environments where sweat or spilled sports drinks may be a concern. The bearings also use LLB-type seals and Almagard 3752 grease to help protect against water. Enduro 440C stainless steel headset bearings are used in many popular headset brands and come with a lifetime warranty.

The Enduro angular-contact headset bearing range uses either Black Oxide-treated chromium steel races or full 440C stainless steel. The bearings are engineered with the largest balls possible, dual-lip seals riding in a micro-groove (labyrinth), and 90% high-pressure waterproof grease fill. Angular Contact (A/C) bearings are designed so that all balls engage evenly, spreading force over a larger surface area and minimizing wear.

• Static load – 980lbf / 4.35kN
• Weight – 25.5g

Headset bearing: 34.1x46x67 mm (45x45o).