SHIMANO SIS INDEX 6 SPEED GEAR LEVER | ABX Distribution
SIS REAR INDEX SHIFTING SYSTEM | SHIMANO BIKE COMPONENT
Replacement for an old 6-speed SIS rear derailleur : r/bikewrench
Shimano TY18 5/6 Speed Rear Derailleur
Amazon.com : Swagtron Swagcycle EB-6 Bandit Trail Electric Bike with Removable Battery and Dual Disc Brakes, Black, 20" Wheels : Sports & Outdoors
Shimano SIS Tourney RD-TY300 6 Or 7 Speed MTB Bicycle Rear Derailleur Bleck New | eBay
Vintage Shimano Exage Action SIS 6 Speed Bicycle Rear Derailleur Rd a 350 for sale online | 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