2x Bicycle Headset Bearings B543-2RS 

Also know as 397508VRS or HD169

39.7x50.8x7.14

This is a replacement for lefty fork headsets. Please check for compatibility 

Weight kg = 0.028800

Precision Grade = ABEC 3

Inside Diameter = 39.688mm = 1-9/16"

Outside Diameter = 50.8mm = 2"

Width = 7.144mm = 9/32"

Material = 52100 High Carbon Chromium Alloy

Image = Image represents the series, but may not be the exact part

Alternative Brand = In the very unlikely event that we should not have available free stock in the listed brand, then a quality brand will be supplied.

B-543-2RS-MAX Enduro Max Bike Bearing 39.69x50.80x7.14 (1-9/16X2X9/32)

Typical Applications: For Cannondale Lefty/Headshock Headset

Enduro Max Bearings Specification:

Maximum quantity of Grade 10 Chromium Steel Balls:

MAX bearings are filled completely with high precision Grade 10 balls for maximum load capacity. No retainer means these bearings have 40 percent more capacity. The balls must be filled by hand, through a precision slot ground into the inner and outer race.

52100 High Carbon Chromium Alloy Races:

Purest alloy steel with the toughness like no other. MAX bearings use CRC Marine Grease, will not wash out or break down under any extreme circumstances. Even salt water will not penetrate or break it down.

LLU Seals:

Two sealing lips on each seal, which ride in a matching groove on the inner race to make a labyrinth seal. The outer sealing lip repels dirt/water while the inner retains grease. These seals essentially form a “hydromatic seal” of grease when in operation, the grease forming a barrier in the groove

High quality bearing, from a trusted manufacturer