Win in all types of gravity races! The modular chain guide from SHIMANO is robust and efficient. The rider can mount one, two, or no chain guards depending on the course and usage. The chain guide features minimal impact protection to safeguard the chains and the chainring from impacts. And thanks to the interchangeable muffler, there is less distraction from noise, allowing you to focus better on the ride. Additionally, SHIMANO's modular chain guide ensures an extremely stable and quiet drivetrain with the SHIMANO Shadow+ rear derailleur.