svenhöek-
ask a pedalophile
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The kind that has an oil or grease nipple.
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What is the most wet proof freehub design?
A fixed wheel :) All freehubs are compromised by the fact that seal drag between the rotor and the hub shell turns the sprockets forwards when you stop pedalling, leading to flapping chain and slow pick up. The interior bearing seals are OK because they have a small diameter, so the seal drag doesn't have a large moment. The problem comes at the junction between the rotor and the hub shell, where you have to create a seal that's about 35-40mm in diameter. Contact seals are better than labyrinth, and labyrinth is better than nothing.
Store the bike in a warm dry place, and pull the freehub off and clean it if you've been riding in particularly wet or filthy conditions. If you can't do that, prioritise designs which are cheap to repair.
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dancing james
withered_preacher
gbj_tester
Handy hint 1: Use the full model number (e.g. FH-T610) and "EV" as your search query. That got the spare parts diagram as first result. Then use the part number (Y4FL98090 in this case) as a search term, most of the time SJSC will be the first result if they have it.
Handy hint 2: With Shimano freehubs, the greatest weakness is being put up wet. They are not well sealed from the spoke end, and water in the rotor bearing will seize them up in a matter of days.