SHIMANO TOURNEY Medium Cage Rear Derailleur 6-speed | SHIMANO BIKE-EU
Amazon.com : Rear Derailleur, Huazu Bike Parts Gear Shifter for RD-TZ31-A with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles : Sports & Outdoors
New 7 speed commuter with Shimano SIS index. No noise on stand, shifts smoothly but low clanking sound on road when pedaling in 4th & 5th though not other gears : r/bikewrench
SHIMANO SIS MTB Bicycle Bicycle Parts RD-TZ31/TY21 Bicycle Mountain Bike MTB 7/21 Speed Bicycle Rear Transmission Free Shipping _ - AliExpress Mobile