Shimano Revoshift SL-RS35,7 Speed Bike Right Shift Lever for Mountain Bicycle
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
SHIMANO REVOSHIFT Shifter DUAL SIS INDEX 3-speed | SHIMANO BIKE-EU
Shimano RevoShift SL-RS25 Twist Grip Shifter 3/7/6 Speed Left or Right MTB Bike | eBay
Shimano RevoShift SL-RS35 3 x 7 Speed Bike Grip Shifter Set + Grips NEW - Walmart.com