I'm new to this forum and tandem riding so please bear (bare) with me if I ask some silly questions. I recieved a tandem last year as a wedding gift from my grandma. Yeah grandma! We have been really enjoying it but as where we live is very mountainous we sometimes feel like a lower gear or two would be nice. Right now we have a 11/32 cassete on the back and on the weekend I went to the local bike shop and ordered one with a 34 teeth. Oh, sorry for wandering around here but I suppose I should add that I live in Japan and tandem riding is quite unusual so although Makoto knows a lot about bikes not so much about tandems. Anyway, he asked which cassette I wanted and as the rear derailer is a Shimano LX I said LX. But now that I am looking at the specification of our bike I have noticed that it has an Atomic Tandem Pro rear hub. Does that mean that only a tandem specific cassette will fit on it. And is there a difference in strength between a tandem cassette and a mountain bike cassette.