Check the listing for details. 110BCD Bike Chainring 42T 175.75mm Diameter Round Aluminum with Screws Black. Condition: New. Listed at 26.95 USD. 1. Constructed from high-strength aluminum alloy through precision CNC machining, this material offers an excellent strength-to-weight ratio, ensuring a durable chainring.2. Designed with a wide-narrow tooth profile to securely engage the chain, enhancing riding efficiency and minimizing wear for a smoother ride. This innovative design reduces the risk of chain drop, ensuring precise shifting even under rigorous cycling conditions.3. Specifically designed for road bikes, this chainring enhances overall riding performance and meets diverse cycling needs across a variety of riding conditions. It supports 7, 8, 9, 10, and 11-speed chains, offering exceptional versatility for modern road cycling.4. Ensure the crankset matches before buying to prevent problems. Mismatched parts may cause performance issues or damage.