![My daughter's Trek came with a 6-speed Shimano Revoshift SIS Index. It's a new bike. She can shift to higher gears easily but does not have the grip strength to shift back My daughter's Trek came with a 6-speed Shimano Revoshift SIS Index. It's a new bike. She can shift to higher gears easily but does not have the grip strength to shift back](https://preview.redd.it/xbz2kfj9mbx01.jpg?auto=webp&s=a17a5788686bdc980b64163a7e123b3a27228459)
My daughter's Trek came with a 6-speed Shimano Revoshift SIS Index. It's a new bike. She can shift to higher gears easily but does not have the grip strength to shift back
![Amazon.com: Shimano Revoshift SL-RS35,7 Speed Bike Right Shift Lever for Mountain Bicycle : Sports & Outdoors Amazon.com: Shimano Revoshift SL-RS35,7 Speed Bike Right Shift Lever for Mountain Bicycle : Sports & Outdoors](https://m.media-amazon.com/images/I/61GGfa4V-yL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Shimano Revoshift SL-RS35,7 Speed Bike Right Shift Lever for Mountain Bicycle : Sports & Outdoors
![Shimano Tourney SL RS36 RS35 RS25 Revoshift Bike Twist Shifter Lever 3/6/7Speed 18s 21s RS35 as RS31For MTB Bike Bicycle Parts|shifter brake lever|twist shifterbike shifter - AliExpress Shimano Tourney SL RS36 RS35 RS25 Revoshift Bike Twist Shifter Lever 3/6/7Speed 18s 21s RS35 as RS31For MTB Bike Bicycle Parts|shifter brake lever|twist shifterbike shifter - AliExpress](https://ae01.alicdn.com/kf/Hb8c1a80d99b04e85bb95d125307c6092r/Shimano-Tourney-SL-RS36-RS35-RS25-Revoshift-Bike-Twist-Shifter-Lever-3-6-7Speed-18s-21s.jpg_Q90.jpg_.webp)