Amazon.com: ZUKKA Revoshift 7 Speed Shimano Right Shift Lever SL-RS35-7R Bicycle Twist Shifter Lever Mountain Bike Commuter Bike Folding Bike : Sports & Outdoors
REVOSHIFT Shifter SIS INDEX 7-speed | SHIMANO BIKE-EU
Amazon.com: Hycline Revoshift SL-RS35,7 Speed Bike Right Shift Lever for Mountain Bicycle : Sports & Outdoors
Replacing Shimano Revoshift With SRAM Grip Shift Shifters - YouTube
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