With a variety of form factors to provide you with exactly the ergonomics you want, microSHIFT TS38 Thumb-Tap shifters combine light shifting effort with a wide range of derailleur compatibilities. Whether you‚ÄöÑre building a new bike or getting an old one back on the road, you can rely on these to do the job. Features-Compatible with Shimano 7 speed drivetrains -Easy to read gear indicator -Light shifting action with positive index click -Ergonomic thumb triggers Item Specifications-Double or Triple:Triple-Drivetrain Speeds:7-Rear Der/Shifter Compatibility:Shimano Mountain-Shifter Style:Thumb