hahahaha. don't listen to dumba55 fixedmonkey above me. drunks in a garage? puhhhleeeeaaze. companies like profile racing (make some of the best hubs in ANY bicycling discipline) make 3/8 axle'd hubs for racing. go to
www.profileracing.com and snoop around. you can PM me anytime and i'll help you with anything, plus i've got a few friends that ride for them. you can get a cassette hub and just switch cogs very easily. let me know what you think. don't listen to the people on here that have no idea what they're talking about.