microSHIFT TS38 Thumb-Tap Shifter Set - 7 Speed Triple Optical Gear Indicator Shimano CompatiblemicroSHIFT TS38 Thumb Tap Shifter Set 7 Speed Triple Optical Gear Indicator Shimano Compatible. 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 youre building a new bike or getting an old one back on the road you can rely on these to do the job. Easy to read gear indicator Light shifting action