TOM rear wheel General specifications: Colour: black/silver Rim material: aluminium Type of bike: city bike Position: rear Inch size: 26 x 1.75 ETRTO size: 559-25 Brake system: roller brake Weight: approx. 2425 grams Rim specifications: Width: 30 mm Inner width: 24.6 mm Height: 15 mm With brake surface: yes Valve hole: 8.5 mm Spoke specifications: Material: zinc Number: 36 Thickness: 2.3 mm Hub specifications: Type: Shimano Nexus SG-C3001 Number of gears: 7 Installation width: 120 mm Axle length: 190 mm