You'd be surprised how much grunge can make its way into the bearings without any kind of cap. Since most grease formulations will attract grit and then adhere to it, you end up adding a grinding paste to your bearings. Not immediate, of course, but something to avoid if possible. (Think about all that fine dust and road grit you wash off your legs at the end of a longer ride.) A rubber o-ring will probably work well - at least as well as plastic. You might just ask at the LBS - they tend to end up with those bits.
You're probably unlikely to put a lot of sweat down there at modest riding speeds - if you set it up on a trainer though, the sweat will funnel down there like you won't believe. - Jim / cyclofiend.com -- 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 rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/groups/opt_out.
