Welcome to our store! This Boost hub adapter is suitable for converting the front hub cylinder from 100mm to 110mm and is made of high-quality aluminum alloy material, which is anti-corrosion and not easily deformed, ensuring durability. It is an original standard, direct replacement for the old or broken one, ensuring wonderful braking performance. This Boost hub adapter comes with all necessary accessories, including spacers and screws, making it easy to install and convenient to use. It is designed to adapt to the corresponding disc brake rotor position and the requirement for opening gear, solving the problem of compatibility between the hub and the front fork and frame. Item Type: Boost Hub Adapter Material: Aluminum Alloy Color: Black Specification: Front 15mm hub cylinder axle for converting 100mm to 110mm front hub adapter Thickness: Approx. 5 mm / 0.20 inch Front spacer thickness: Approx. 5 mm / 0.20 inch Outer diameter: Approx. 5.2 cm / 2.0 inch Inner diameter: Approx. 3.9 cm / 1.5 inch Application: Suitable for converting the front hub cylinder axle from 100mm to 110mm, to adapt to the corresponding disc brake rotor position and the requirement for opening gear, solving the problem of compatibility between the hub and front fork and frame. Package includes: 1 x Boost Hub Adapter 1 x pair of spacers 6 x screw 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the item, such as damage and incorrect quantity of goods, please contact the seller immediately. We will do our best to provide you with satisfactory customer service.