![Mystery adjustment on Shimano Tourney rear derailleur - Is this "B" adjustment or something else? TIA : r/bikewrench Mystery adjustment on Shimano Tourney rear derailleur - Is this "B" adjustment or something else? TIA : r/bikewrench](https://i.redd.it/yzocx4o947581.jpg)
Mystery adjustment on Shimano Tourney rear derailleur - Is this "B" adjustment or something else? TIA : r/bikewrench
![Amazon.com : Shimano Tourney TY500 6/7-Speed Long Cage Rear Derailleur with Frame Hanger for BMX/Track Frame : Sports & Outdoors Amazon.com : Shimano Tourney TY500 6/7-Speed Long Cage Rear Derailleur with Frame Hanger for BMX/Track Frame : Sports & Outdoors](https://m.media-amazon.com/images/I/61XOwQJ190L._AC_UF1000,1000_QL80_.jpg)
Amazon.com : Shimano Tourney TY500 6/7-Speed Long Cage Rear Derailleur with Frame Hanger for BMX/Track Frame : 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 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](https://preview.redd.it/vv3hkc5rfl551.jpg?width=640&crop=smart&auto=webp&s=c0945e70f8f716808444cdcba03a0a1661c6d441)
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
![7 speed shimano gear set. Can't shift and is stuck between 6th and 7th gear so the chain keeps getting out. The shifter(one in handlebar) is also stuck but freely rotates between 7 speed shimano gear set. Can't shift and is stuck between 6th and 7th gear so the chain keeps getting out. The shifter(one in handlebar) is also stuck but freely rotates between](https://i.redd.it/3zq6lt5n9jk51.jpg)
7 speed shimano gear set. Can't shift and is stuck between 6th and 7th gear so the chain keeps getting out. The shifter(one in handlebar) is also stuck but freely rotates between
![Amazon.com : ZUKKA Shimano Rear Derailleur RD-TY21B 6/7 Speed Direct Mount for MTB Mountain Bike : Sports & Outdoors Amazon.com : ZUKKA Shimano Rear Derailleur RD-TY21B 6/7 Speed Direct Mount for MTB Mountain Bike : Sports & Outdoors](https://m.media-amazon.com/images/I/61BU+pZTgJL._AC_UF1000,1000_QL80_.jpg)
Amazon.com : ZUKKA Shimano Rear Derailleur RD-TY21B 6/7 Speed Direct Mount for MTB Mountain Bike : Sports & Outdoors
![ENBO Shimano Bike Rear Derailleur RD-TY300 6/7 Speed Rear Derailleur Road MTB Bike Mountain Bike Direct Mount ENBO Shimano Bike Rear Derailleur RD-TY300 6/7 Speed Rear Derailleur Road MTB Bike Mountain Bike Direct Mount](https://www.gosupps.com/media/catalog/product/cache/25/image/1500x/040ec09b1e35df139433887a97daa66f/6/1/61MFnebWxSL._AC_SL1322_.jpg)
ENBO Shimano Bike Rear Derailleur RD-TY300 6/7 Speed Rear Derailleur Road MTB Bike Mountain Bike Direct Mount
![Amazon.com : INKESKY Shimano Rear Derailleur RD-TZ31-A 6/7 Speed Hub Bolt Mount (Hanger Mount) for Mountain Bike : Sports & Outdoors Amazon.com : INKESKY Shimano Rear Derailleur RD-TZ31-A 6/7 Speed Hub Bolt Mount (Hanger Mount) for Mountain Bike : Sports & Outdoors](https://m.media-amazon.com/images/I/71GTuypW-3L._AC_UF1000,1000_QL80_.jpg)