Miche headseTs use needle roller bearings and i have one in my wet weather bike. It has seen thousands of miles of shitty weather and it still perfect. needle bearings are fine for headsets if it is a good one.
Not suggesting that roller bearings will fail catastrophically, but considering the loads a HS experience, they are inferior to ball bearings (whether loose, caged or cartridge).
Miche headseTs use needle roller bearings and i have one in my wet weather bike. It has seen thousands of miles of shitty weather and it still perfect. needle bearings are fine for headsets if it is a good one.