Originally Posted by Peter_B

I'm using that Miche headset on one of my bikes. It is easy to adjust ... slip the plastic ring up and put two headset wrenches in there, where they are contained on the sides and don't sideways slip off like when you are wrenching with the more open design of traditional headsets.

The Miche is different than the Stronglight A9 in that the cones formed by the needle bearings point towards each other in the Miche and in the same direction in the Stronglight. I don't know if one design is better than another for centering or something.

As for quality of sealing, I do not know. I use Lizardskin neoprene headset seals on the lower headset race on all my bikes and donot rely on the seals in this Miche or any headset. The external seal of the Lizardskin neoprene headset seal stops the grit, and perhaps any headset seal will allow in some water and grit over time. I don't know and don't want to find out. Back in the day, I cut rings out of old inner tubes to do the same external sealing.