Shimano SG-S7001 Alfine internal hub gear, 8-speed, 36h, black

Shimano Alfine - Internal Geared Rear Hub - Center Lock - Disc Brake - O.L.D. 135 Mm - 8-Speed- The Shimano Alfine S7001-8 Hub Offers A Wide 307% Gear Range And An Improved Internal Structure For Better Gear Engagement. It Is Approved For E-Bike And Non E-Bike Use And Is Available In Black And Silver. Features:Improved Overall Riding Comfortability And Efficiency:- Higher Shifting Performance Even Under High Chain Tension Induced By E-Bike Motors- Improvement Is Suitable For Both E-Bike And Non E-Bike UseSpecifications:- Speeds: 8- Gear Ratio_Total: 307%- Gear Ratio_1: 0.527- Gear Ratio_2: 0.644- Gear Ratio_3: 0.748- Gear Ratio_4: 0.851- Gear Ratio_5: 1- Gear Ratio_6: 1.223- Gear Ratio_7: 1.419- Gear Ratio_8: 1.615- Shifting Power Modulator: Yes- Spoke Hole_32h: Yes- Spoke Hole_36h: Yes- Axle Length (Mm)_187: Yes- Shifting Structure: Top Normal- Driving Efficiency: High- Flange Diameter (Mm): 104.3- Flange Width (Mm)_Left: 3.2- Flange Width (Mm)_Right: 3.2- Gear Change Support Mechanis