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- 2:1 Actuation Ratio for use with Shimano and many Sram derailleurs
- Aluminum lever and body
- Includes slick galvanized cable
- 22.2mm clamp diameter
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This SunRace brand top mount thumb shifter is an economical option for bikes with 8 cogs on the rear wheel. The shifter is indexed which means one click will change to the next gear. Another handy feature is the ability to shift up or down 2, 3 or even 7 cogs at a time!