Enduro Bearings LLB Stainless Steel Lefty Headset Bearing (50.8mm) - HD169 - 50.8mmx39.68mmx7.14mm

Drop-in replacement B-543 bearing for Cannondale Headshok and Lefty headsets. Compatible Cannondale frames with either removable headset cups or drop-in, direct-fit bearings with a 50.8mm OD x 39.68mm ID x 7.14mm Width and the same as Cannondale part # HD169.

Depending on the application, they are designed to ABEC-3 or ABEC-5 tolerances. Stainless steel has 20% less load capacity than the 52100 chromium steel, used in most Enduro bearings, but with far superior corrosion resistance.

Features

LLB Seals: Enduro Bearings useLLB type seals and CRC Marine Grease in their 440C Stainless Steel bearings,theirmost popular seal type, this is a Nitrile material rubber with a steel insert. Rather than the standard 2RS type seal, Endurogo a step further by machining a groove into the inner race where the seal can rotate with better efficiency and less rolling resistance. Rather than one thick seal lip rubbing on a blunt surface, LLB type utilizes two razor thin sealing lips riding in the groove with light contact. The outside lip keeps the water and contaminates out, while the inner seal retains the grease for smooth function and long intervals between servicing.

440c Stainless Steel: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 treatment processes to achieve its superior mechanical properties. Superior to the more commonly used 440A or 440B that other bearing manufacturers use interested in saving money, 440C stainless steel alloy has a higher Carbon content giving it maximum hardness and corrosion resistance after heat treatment and cryogenic treatment.

When the rain won't go away, and your bicycle seems more often to be used as a boat rather than a bicycle, you may want to consider 440C stainless steel bearings. While not quite as hard as chromium bearing steel, 440C stainless steel is a good alternative in constant wet conditions, or where sweat and sticky drinks become a problem with components such as headset bearings and bottom brackets. In fact, Enduro Stainless Steel bearings have become so successful we are now one of the largest suppliers to premium component makers interested in having no warranty problems and the best performance for their customers.