i hate to make it more complicated but have more questions
http://cgi.ebay.com/2-Bicycle-Bearin...item2eb2ee34cf

so that would be back rim,
i bike about 20 miles a day (race it in traffic)
are there any stronger (like sealed) bearing available for this hub
I've also seen ceramic bearings, could not find relative size- are these any good or do they come 9 x1/4

quote rear 18, front 20 - what these numbers represent


thanxH/C