DescriptionThis flywheel is made of aluminum alloy material, which is durable and sturdy. It has the characteristics of low density and corrosion resistance, and it has qualified quality and long service life.Our machine it for a precise fit and to make sure it is very light.Feature- Color: Blue. - Material: Aluminum Alloy. - Size: 3.55x3.03x7.2cm/1.39x1.19x2.83inch - Made of 7075 aluminum material, lightweight, high strength, corrosion resistance. - Smooth and bright surface, high gear density. - Strong and stable, tight bonding. - Replace old or broken flywheel cover with a new one. - Suitable for mountain bike, road bike and folding bicycle.