¿ BIKE TRAY - Narrow and wide plain round chainring 130 BCD for road bike 8 9 10 11 12 speeds. The versatility of the tray, no longer dropping chains, simply installs. High speed CNC engraving and milling hard oxidation treatment, In order to let you enjoy driving, it is important to choose the quality.¿ SAFE AND EFFECTIVE DESIGN - Built-in CNC machining, the intensity is safer, apply for a long time cycle. Extended edition more or less the shape of the tooth, the chain can have a better effect.¿ LIGHTWEIGHT DESIGN - The tray is made of alloy structure, lightweight but sturdy. with positive and negative (the corresponding chain tooth width of the positive tooth; the corresponding negative chain of the tooth is narrow), teeth designed to prevent the chain from falling off.¿ Smooth beautiful - The bicycle tray made of high quality materials can maintain a smooth surface, bright colors, fading and corrosion resistance. It is easier to clean than a traditional tray and will make your bike more beautiful overall.¿ ONE YEAR QUALITY WARRANTY - If, for any reason, you are not completely satisfied with the purchase you made, or any quality problem within one year. Please feel free to email us, we will try our best to make it suitable for you as soon as possible. Or just return the product for a full refund.Warning:Do not use with accessories other than those supplied or recommended by the manufacturer.Warning:Not suitable for children under 14 years. For use under adult supervision.Warning:Protective equipment should be worn. Not to be used in traffic