What technology is in the bearings of wheels of cars/bicycles such that they are used in the rain without worrying about corrosion? Asking because everyone just told me skateboard/roller skate wheel bearings would rust if I skate in the rain, or just going through a puddle would ruin them.
In: Other
Car bearings are full of grease and had a plastic/rubber seal around them to keep dirt/dust/water out.
The grease and seal adds some friction to the bearing, so it rolls a bit less easily, not much of an issue for a car as the engine has plenty of power.
Skate bearings are usually unsealed and lightly greased to give the least rolling resistance so it can roll/skate faster, but this is at the cost of reduced lifespan and is more susceptible to dust/dirt/water.
Sealed bearings will be more durable, but will not “roll” as nicely.
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