The 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, resulting in the quickest possible gear changes
• SUPER SLR design makes use of a friction-reducing mechanism lever and cable that improves response and modulation
• OT-SP41