SHIMANO 12S SGS Single CS Compatible IRDM9100SGS RD-M9100 Front 10-45T 10-51T

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. Smooth shifting performance Optimized new drive system Silent drivetrain Reduces rear derailleur tension in low gear positions, prevents high chain tension in low gear positions Added bumper to rear derailleur pulley cage Large 13T pulley Low profile design Shimano Shadow RD+ Low sprocket configuration 10-51T (12 speed) 10-51T (12 speed)