Vintage NOS Shimano SIS SL-MY20 6 Speed Thumb Shifter -Cruiser MTB | eBay
Replacement for an old 6-speed SIS rear derailleur : r/bikewrench
Shimano SIS - ReubensCube
Bicycle Rear Derailleur Original Shimano Sis Tz31 6/7 Speed 18/21 Speed Shifter Mtb Mountain Bike Folding Bike Rd-tz30 Tz31a - Bicycle Derailleur - AliExpress
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 derailleur RD-TY18 with hook 6-wheel SIS road - MTBIKER.shop
Amazon.com : ENBO Shimano Bike Rear Derailleur RD-TY300 6/7 Speed Rear Derailleur Road MTB Bike Mountain Bike Direct Mount : Sports & Outdoors
Amazon.com : Rear Derailleur, Huazu Bike Parts Gear Shifter for Shimano RD-TZ31-A with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles : Sports & Outdoors
Shimano NOS Bicycle Ultegra Model 6400 Rear 6 & 7 speed SIS Lever Unit – Loose Screws Bicycle Parts
SIS REAR INDEX SHIFTING SYSTEM | SHIMANO BIKE COMPONENT
Shimano Tourney RD-TY300-SGS Rear Derailleur - 6/7 Speed, Long Cage – The Path Bike Shop