Compatible with ESP (1:1 actuation ratio) rear derailleurs . SRS: Speed Release Spool internal upshift assist spring. Grilon composite construction with carbon finish styling. 50mm 'Shorty' tornado-style grip and QuickView gear indicator. Tethered cable replacement port for easy cable change. Micro-friction adjustable, 3 gear compatible left hand front shifter. Includes: Teflon coated stainless cable.