Check the listing for details. Rear Derailleur, RD-TZ31A 6/7 Speed Derailleur with Direct/Hanger Mount, for Mou. Color: Direct Mount, Condition: New. Listed at 25.87 USD. Model: RD-TZ31A Direct Mount Rear Derailleur, suitable for GS 6/7 speed SIS index shifting drivetrain. Premium Materials: The rear derailleur utilizes durable aluminum alloy and plastic alloy material, combined with exceptional shifting performance, ensuring safe and stable riding. Widely Used: Bike 6/7 speed derailleur suitable for most kinds of bikes like mountain bike, road bike, folding bicycle etc. Easy Installation: Mountain bike derailleur features a standard direct mount design ensure easy installation and adjustment, making it accessible for both beginner and experienced cyclist to set up. Important: To avoid delays or issues, please confirm whether it is a direct mount or hanger mount bicycle derailleur before purchasing.