Features: The inner ring is made of aluminum 7075.T6 and the ring gear is made of high-performance steel.. Self-cleaning dirt groove between each tooth prevents dirt accumulation.. Longer life than standard aluminum sprockets and lighter than steel sprockets..
Features: Manufactured from premium-quality C45 high-carbon steel. CNC precision-machined to assure tight tolerances. Machined with lightening holes. Attractive bright zinc-plated finish.