Shimano Tourney RD-TY21 6/7/8 MTB / Hybrid Bike Rear Derailleur NEW | Random Bike Parts
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
6 Speed Shimano SIS Rd-L541 long cage rear derailleur
retrobikefranken - Shimano SIS RD- TY20 A derailleur
Shimano SIS RD-M531 Mountain Road Bike 6-7 Speed Long Cage Rear Derailleur NICE | eBay