I started looking around for a better set of headset bearings after having brown rusty water run down the forks of my bike after a rainy ride and wash up afterwords.  They replaced the OEM bearings that would last about 8 months before the rusting started getting so bad that it affected the performance of my headset and I started getting the disturbing brown water.  So far so good on the Enduro bearings.  These seem to have eliminated the brown water issue and the my headset still turns smoothly after several rides (including some rainy ones and one deluge ride)!  Also, these bearings aren’t out of this world expensive considering the improvement they made to my overall riding experience.  I would confidently recommend them to anyone who rides in occasionally wet weather.