Enduro B 543 LLB SS Stainless Steel Bearings

Enduro stainless headset bearings feature 440C stainless steel balls and races to provide maximum corrosion resistance. Not all stainless steel is created equal. Enduro only uses 440C stainless steel balls and races to provide long life and superior corrosion resistance in applications and environments that may be less than ideal.

440C has the highest strength, hardness, and wear resistance of all the standard 440-series stainless alloys with high carbon content. As expected, it is also the most expensive of the 440 series alloys and requires multiple rounds of heat treatment and cryogenic treatment to achieve its superior mechanical properties. Though stainless steel has 20% less load capacity and is slightly softer than our standard 52100 chromium steel used in most of our bearings, stainless steel is an excellent alternative for use in wet conditions, if you wash your bike often, or where sweat can be a problem. Bearings also uses LLB type seals and CRC Marine Grease in these bearings to additionally waterproof against the elements. The Enduro line of headset bearings begin with chromium steel, Black Oxide finish A/C type and then offer full 440C stainless steel at the top. They are always engineered with the largest balls possible and dual lip seals riding in a micro groove for ultimate protection against sweat and the elements. They are filled 90% with high pressure waterproof grease, so you never have to guess if there is grease inside.

Bearings Seals

LLB Seals

Enduro's most popular light contact seal. LLB seals are comprised of Nitrile material rubber with a steel insert and ideally suited for constantly spinning bottom bracket and hub bearings. Rather than one thick 2RS seal lip rubbing on a blunt surface, LLB type utilizes two razor thin sealing lips riding in the bearing race groove. The outer lip keeps the water and contaminants out, while the inner lip retains grease for smooth function and longer intervals between servicing.

Specification

• Bearing Code: B 543
• ABEC: 3
• Grade: 10
• Grease: Kyodo Yushi PS-2
• Application: Headsets
• Weight: 28.77g