Swishti Narrow-Wide Bike Oversized Fully-CNC Derailleur Pulley 14T Gold
SwishTi Narrow-Wide Rear Derailleur Bicycle Oversized Pulley. Teeth:12T / 14T / 16T available. Weight: approx.12g(12T) / 15g(14T) / 16g(16T). Each tooth alternates thickness, narrow wide narrow wide, all the way around the pulley.