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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 Rear derailleur fixing problem - Bicycles Stack Exchange
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How to adjust bike Derailleur gears Shimano SIS gear setup adjusting bike DIY - YouTube