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Computer designed Hyperglide (HG) sprockets incorporate specifically positioned shift ramps and tooth profiles for improved chain control during shifting. Fast and responsive indexed shifting is the result. Close-Ratio wide-range Mega-9 Gearing Light weight design Titanium HG Sprokets design Alloy Sprocket Carrier Gearing:(ba) 11-32T, (as) 11-34T, (ap) 12-34T Weight:240g (11-32T)