Shimano TIAGRA ST-R4720 Left Shifter Rear Brake Lever with BR-4770 Rear Disc Brake

New 10-speed TIAGRA provides serious entry-level riding performance with cascaded technology from top-tier lines.

Improvements include: more intuitive control for shifting
The new 10-speed cable pitch for wider frame compatibility, upgraded with cascaded technology from DURA-ACE and a 30% increase in brake power (same level as BR-5700)
. Ergonomic design for greater rider comfort and control in all conditions
. SIS
. Reach Adjust
. SP41 gear cables mean quick and intuitive gear shifting operation
. Optislick outer cabling
. Recommended Brake Pads: Shimano Dura Ace BR-R9170 K04S Metal Brake Pads and Spring, Shimano BR-R9170 K03S Resin Disc Brake Pads and Spring