Enhance the performance and longevity of your motorized bicycle with this high-quality Pulley Tensioner Roller, specially designed for 49cc, 66cc, and 80cc engine motorized bikes. Crafted from durable ABS and metal materials, this chain roller effectively reduces pressure on the chain, ensuring consistent tension and a smoother, more reliable riding experience. Key Features: · Compatible Models: Specifically designed to fit 49cc, 66cc, and 80cc engine motorized bicycles. Please verify compatibility with your bike model before purchase. · Improved Chain Performance: The pulley tensioner roller maintains optimal chain tension, reducing wear and preventing slippage for enhanced riding stability. · Durable Construction: Made from high-strength ABS and metal, this tensioner roller resists deformation and cracking, providing long-lasting durability under regular use. · Easy Installation: Designed as a direct replacement part with an approximate 9mm inner diameter, it offers a hassle-free installation process without the need for modifications. · Complete Package: Includes one pair of pulley tensioner rollers, making it a necessary and convenient accessory for maintaining your motorized bicycle’s drivetrain. Specifications: · Item Type: Chain Roller · Material: ABS + Metal · Installation Inner Diameter: Approx. 9mm / 0.35in · Quantity: 1 Pair · Fitment: Suitable for 49cc, 66cc, and 80cc Motorized Bicycle Bikes (installation dependent on size compatibility) Upgrade your motorized bicycle with this reliable pulley tensioner roller to ensure consistent chain tension, reduce mechanical stress, and enjoy a smoother ride every time. This essential replacement part combines durability, functionality, and ease of installation to keep your bike running efficiently.