Cambio Traseiro Shimano XTR SGS RD-9100

XTR M9100系列变速器提高了换挡性能，优化了新传动系统，并具有降低低档位时后拨链器张力、额外的后拨链器支撑板和13D大尺寸飞轮等特点。

• The description claims that it improves gear shifting performance.
• The description claims that it is optimized for the new actuation system.
• The description claims that it has reduced tension in the rear derailleur at low gear position to prevent high chain tension in low gears.
• The description claims that it includes an additional support plate on the rear derailleur and uses 13D large sprockets.