• Shimano Tourney RD-TX800 Rear Transmitter 7-8V Brand: Shimano Shimano Group: Tourney TX Shimano Group Code: RD-TX800SGSL Material : Aluminum Gears: 7/8V Total capacity: 43 T Largest gear max: 34 T Largest gear min: 28 T Smallest gear max : 14 T Smallest gear min: 11 T Color: Black Robust and light moving gear shifting performance for stress-free driving Double Servo-Panta mechanism Fast assembly