Dérailleur chains of the width range of 7.8-7.3mm should work well. One of the problems with bikes is that the "size' that some parts are described by are not actual measured dimensions. So while all current dérailleur chains can be called 1/2"x3/32" in reality the ones for more gears are narrower then those for less gears. If you use a narrower chain then recommended it can get trapped between the front rings. Andy.