Number of teeth: 50-34T Gear plate material: high-quality steel for outer plate and inner plate Crank material: FORGED AL-6061-T6 Support variable speed: 8-9S BCD: 110mm Crank chainstay distance:- Chain center line: 45.5mm Crank length: 170MM Color: plate baking lacquer gray, crank polished silver Universal for folding bikes, road bikes, and single-speed vehicles Weight: 800 grams (without bottom bracket) Recommended bottom axis length: 110mm

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