Shimano Revoshift Shift Lever SL-RV100 6 SpeedBENEFIT Ergonomic grip design with light shifting operation for small hand riders (around 25% lighter operation vs. SL RS35) Easy cable replacement Easily visible gear position indicator PRODUCT SPECIFICATION Model No SL RV100 6s Series SHIMANO Shifter type REVOSHIFT Rear speeds 6 Compatible rear derailleur type MTB 6 speed Mount typeClamp band Max. multiple shifts (main lever rear) 5 OPTICAL GEAR DISPLAYWith Shift lever cableInner cable Steel Color

which means you can wear The T421 with or without cleated bike shoes

Switching stages: 10-fold

Model No                                                        SL-RV100-6s

and it comes with enough to use for multiple bikes

Model: FC-RX820-1

Riveted adapter_Road type:

FC-R8100-P

Gear rear: 12-speed

Shimano ALTUS M310 3x7/8 Speed Top Swing Front Derailleur

Damage-resistant teeth

Top-Normal spring type_SHADOW RD+: ✔

MODEL NO : ST-4720