NEW Shimano Tiagra SL-4600 10-Speed Right Flat Bar Rapidfire Plus Shifter Road shifter_9speed the upgrade kit allows you

the upgrade kit allows you to experience AXS without needing to buy an entire groupset

Includes resin brake pads

The Apex® 11-speed mechanical shift-brake control gives you all the gears you need in the palm of your hand

With thoroughly modern geometry and a highly adaptable suspension platform

and four sets of Three-Pack mounts

NEW Shimano Tiagra SL-4600 10-Speed Right Flat Bar Rapidfire Plus Shifter Road shifter_9speed the upgrade kit allows youThe Shimano Tiagra SL 4600 offers Rapidfire Plus shifting with 10 speed road drivetrain compatibility. Optical gear display indicates gear position with just a glance RAPIDFIRE PLUS technology is suited to quick shifting, giving riders the ability to downshift three gears in one stroke 2WAY RELEASE means shifts can be released by pull of the index finger or push of the thumb INSTANT RELEASE shifting releases cable as soon the lever is activated,