Clamp-on: 1-1/4" or 1-3/8"
Weight: 118 g.
If you're looking for beefy stealth, consider the XX front derailleur which shifts across the entire gearing range with near nil chain rub and a granny gear that can be cross-chained within one or two cogs without cage rub. The cage is steel and its parallelogram arms are forged aluminum. Thin, flexible clamp is lightweight and conforms easily to non-round tubes. The return-spring tension is boosted to force crisp direct-mount frame interfaces and in high and low-pull cable configurations. Lightning fast two-chainring derailleur is designed from scratch specifically for 2x10.