Thanks mike and daredevil. I've actually got a mtb crankset around - 44/32/20 with a 12-34 8 speed cassette. Since I ride around w/a range of 35-100 inches just using the smaller of my two front rings (52/46), I was just wondering if I would ever use the lower tooth rings on the mtb. Sounds like it'll probably be fitting, esp after packing some weight onto the bike.