How to change the REVOSHIFT gear shifter on your bike ? - YouTube
SHIMANO BIKE RS31 LEFT REVO SHIFT TWIST GRIP GEAR SHIFTER SL-RS31-L LEFT SIDE | eBay
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 Tourney SL-RS35 Revo Shift Lever Bike Bicycle Speed Shifter L+R | eBay
Shimano Tourney SL-RS35 Revo Shift Lever Bike Bicycle Speed Shifter L+R | eBay
Shimano RevoShift SL-RS35 3 x 7 Speed Bike Grip Shifter Set + Grips NEW - Walmart.com