The Hebie Chain Guard 28-inch is a black plastic chain guard suitable for 28-inch wheels. It has a front section with an 18T sprocket. This chain guard can be installed without tools. It is suitable for various models such as the Nexus 16-23T, Nuvinci 360 19-23T, Alfine 8 19-23T, and Alfine 11 19-23T. The front section is specifically designed for Bosch 2nd generation systems. The distance between the bottom bracket and rear axle should be between 435-486mm. The chain guard comes with a sprocket and is suitable for universal wheel sizes. Product Specifications: - Front chain guard - Suitable for wheel size: 28 inches - Color: Black - Material: Plastic - Length: 53.5 cm - Height: 12 cm - Crank hole diameter: 58.8 mm - Weight: 250 grams - Suitable for models: Nexus 16-23T, Nuvinci 360 19-23T, Alfine 8 19-23T, Alfine 11 19-23T - Suitable for Bosch 2nd generation systems - Distance between bottom bracket and rear axle: 435-486 mm