Flywheel, Ultralight Ring Cover, Cassette Lock Cover Bicycle Chain Cover Lock Ring for Road Bikes Color Style and Size: Blue, Suitable for: Flywheel inertia 11T, size: 35.4mm x 7mm, inner diameter 21.5mm. HIGH QUALITY MATERIAL: The bike steering wheel crown cover is new and high quality. Made of aluminum alloy, low density, corrosion resistance, electrical conductivity, good thermal conductivity. EASY TO USE: The bicycle flywheel ring cover is compact and easy to use. There is no need to remove your chain, which can be very convenient. EXCELLENT PERFORMANCE: Our machine guarantees a precise fit and great lightness. At the same time, it has good electrical and thermal conductivity, which can provide you with a better driving experience. MULTI-COLORS FOR YOUR CHOICE: Our product adds some color to your motorcycle with an aluminum zenith lock ring. It comes in a choice of four colors so you can find something to match your bike. PREMIUM MATERIALS: The cassette lock system is made of high quality aluminum alloy, which is durable, corrosion resistant and heat conductive. EASY INSTALLATION: No tools are required for installation and can be installed in minutes without removing the chain. Lightweight: It is very light for your bike, so you can ride easily. < p>11T cassette type steering wheel lock cover, aluminum alloy material/CNC finish/anodizing/multicolor optional Material: aluminum alloy Specifications: material made of high-strength aluminum alloy, lightweight design, CNC finished, surface polishing. Grinding, anodizing, laser lettering, multi-color optional. High-strength and lightweight design The aluminum alloy material has high strength, high hardness and light weight Laser laser anodized, surface anodized coating, solid texture, beautiful color, corrosion resistance The tooth-shaped bite is precise, and the edge cannot loosen. It matches the standard card fly sleeve, and it is not easy to be damaged during disassembly and assembly. Note: The data are all manual measurement, please allow 1-3cm error, due to the light and display difference, there will be some color difference, depending on the physical object received .