Briny River 105mm Anti Drop Chain Guide Keeper Bicycles Accessory for Road Bikes Black

Product size: The product is 105mm long, 13.5mm wide, 9.5mm high, and 13.5mm in diameter. Manual measurements, please allow slight errors. Compatibility: This bicycle chain guide is suitable for most road bicycles and can effectively prevent the chain from falling off the frame. Product function: Use this chain retainer to protect your middle axis from being stuck by the chain when riding at high speed. Ultra-light design effectively prevents the chain from falling off and prevents damage to the surface of the frame. Easy to install: Direct replacement without adjustment, perfect compatibility, and high reliability. Product material: This product is specially designed and made of aluminum, with a high service life and not easy to damage.