Compatible models: The mx8 zodiac wheel is perfect for the Zodiac Baracuda MX6, MX8 or MX9 Robot. The MX9 pool cleaner part includes 2 mx9 tracks. Easy installation: Easy installation without tools. To replace the mx8 rail, simply remove the rail from the panel and put the new rail back in place. Replacing both r0526100 rails takes less than 10 minutes. Premium Quality: The mx8 pool cleaner rail is made from a heavy-duty rubber material designed to keep the vacuum a certain distance from the bottom of the pool and to provide grip allowing the vacuum to to climb slopes and walls. When to replace the MX6 railWhen you have problems with your cleaner not moving or gripping the pool surface like it used to, or when the teeth inside the rail are worn and degraded, you must check the rail of your pool cleaner.