REVOSHIFT Shifter SIS INDEX 7-speed | SHIMANO BIKE-US
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
NEW Shimano REVOSHIFT SL-RS35 Twist Shift Lever Set , 6 Spd, 3x, Front
Shimano Revo 7 Speed Twist Shifter – Infinity Cycle Works