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How to adjust bike Derailleur gears Shimano SIS gear setup adjusting bike DIY - YouTube
BeeCool Bikes | SHIMANO TOURNEY TY Long Cage Rear Derailleur 6/7-speed
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
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