My understanding of the “pressure compensated” seals on the Schmidt hubs is this: If your bike is inside or anywhere warm, the air inside the hub shell will also warm up and expand. Take the hub outside, and the air in the hub will contract, drawing in air from the outside. If the hub is wet, water will get drawn inside along with the air … unless there’s a pressure compensating device to stop this. This is the advantage of the Schmidt hub—the Shutter Precision is sealed, but not pressure compensated.
However, in order to get water inside a Shutter Precision hub in this circumstance, you would need to take the bike from a warm environment directly into a cold, wet environment so that the hub is wet while the temperature inside it is acclimating to the outside. The simple workaround is to put the bike outside, sheltered from the rain, for a few minutes so the hub doesn’t get wet immediately while the pressure in the hub equalizes. And … it’s likely that we’re talking about the outer edges of longevity here. My guess is that there’s very little difference in lifespan between Schmidt and SP hubs in normal, real-world riding. Schmidt hubs do *look* nicer, if you’re into highly polished alloy surfaces! --Eric Norris [email protected] www.campyonly.com campyonlyguy.blogspot.com > On Dec 2, 2016, at 9:55 AM, Belopsky <[email protected]> wrote: > > Also I live in Michigan so cold and wet and snow and all that happens > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/rbw-owners-bunch. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
