I've my eye on a couple of very cheap roadbikes, one 2x 8spd and one with a 9 speed compact triple.
I'm guessing Campag and Shimano use different splines or something on the hubs so the cassettes are not interchangeable? (please correct if incorrect!) so...
Can you use campag casettes with shimano shifters (assuming the same number of gears on the cassette as the shifter)?
Can you use a 9 or 10 spd cassette on an 8 speed hub? Would you need to change the chainrings converting from 8 to nine speed?
Is 8 speed so old that getting spares would be an issue (would I need to convert to 9 spd if I wore the drivetrain out?) and do road bike drivetrains wear out as quickly as on a mtb?
Sorry if these are stoopid questions, I know naaaathing!

