Originally Posted by
kmart
OK, just checking
The reason I asked is because I saw an ebay listing for a front derailleur that claimed to fit a range of sizes between 28.6 and 31.4mm. I guess they meant that the derailleur would fit these sizes, but each individual size would require a corresponding clamp.
Probably it includes nylon shims to match smaller seat tubes to a larger clamp on the derailleur.