Can I remove the Shimano Tourney's stamped hanger and mount it directly?
#1
Junior Member
Thread Starter
Can I remove the Shimano Tourney's stamped hanger and mount it directly?
Hi,
I was going to get a low end bike for someone, which has a Shimano Tourney A070 rear derailleur. I noticed it has an extra stamped link that looks like a b-link, which is used to extend the derailleur back. On searches of that derailleur, it is frequently sold with the end as a claw hanger instead of the usual mount screw, so I assume the derailleur is designed for bikes with no dropouts.
Now on the bike I saw, it already has a RD dropout, so adding this hanger on top of the dropout would just lengthen everything and change the geometry. The setup would look like this fellow member's:
I also found a website's picture that shows claw hangers should not be mounted on a dropout
Are the bike mfg installing these RD wrong? If when I do get the bike, should I be removing that link and mounting the RD directly to the bike's dropout? This would at the minimum increase rigidity of the RD, and maybe have the chain wrap around the freewheel more.
I was going to get a low end bike for someone, which has a Shimano Tourney A070 rear derailleur. I noticed it has an extra stamped link that looks like a b-link, which is used to extend the derailleur back. On searches of that derailleur, it is frequently sold with the end as a claw hanger instead of the usual mount screw, so I assume the derailleur is designed for bikes with no dropouts.
Now on the bike I saw, it already has a RD dropout, so adding this hanger on top of the dropout would just lengthen everything and change the geometry. The setup would look like this fellow member's:
I also found a website's picture that shows claw hangers should not be mounted on a dropout
Are the bike mfg installing these RD wrong? If when I do get the bike, should I be removing that link and mounting the RD directly to the bike's dropout? This would at the minimum increase rigidity of the RD, and maybe have the chain wrap around the freewheel more.
#2
I'm good to go!
Join Date: Jul 2017
Location: Mississippi
Posts: 14,987
Bikes: Tarmac Disc Comp Di2 - 2020
Mentioned: 51 Post(s)
Tagged: 0 Thread(s)
Quoted: 6193 Post(s)
Liked 4,809 Times
in
3,317 Posts
If the bike was manufactured with it, then it probably needs it if still original cassette size. They are just another version of the things people buy for their bikes to lower the DR when they go to a larger cassette than was spec'd for their DR. Or sometimes it's needed for other considerations.
If you remove it, you need to ensure that your DR pully wheels won't get sucked up into the cassette and spokes.
If you are installing a new DR, then you have to figure that out for the specific situation you have. Some bikes don't have the same dropout configuration as others with respect to DR mounting.
If you remove it, you need to ensure that your DR pully wheels won't get sucked up into the cassette and spokes.
If you are installing a new DR, then you have to figure that out for the specific situation you have. Some bikes don't have the same dropout configuration as others with respect to DR mounting.
#3
Senior Member
Join Date: Jan 2013
Location: South Jersey
Posts: 2,266
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 714 Post(s)
Liked 800 Times
in
475 Posts
I don't know what the website was trying to demonstrate with those pictures, but both of those derailleurs are properly installed. Perhaps they were trying to demonstrate that the claw hanger derailleur on the right can not be installed on a bike that has a derailleur hanger like the one on the left?
You also appear to be using the wrong terminology, as dropouts are the slot that the wheel axle is inserted into. The thing that the derailleur is attached to is a derailleur hanger, which can be claw type, removable or integrated(a non-removable part of the dropout).
You also appear to be using the wrong terminology, as dropouts are the slot that the wheel axle is inserted into. The thing that the derailleur is attached to is a derailleur hanger, which can be claw type, removable or integrated(a non-removable part of the dropout).
#4
Junior Member
Thread Starter
I don't know what the website was trying to demonstrate with those pictures, but both of those derailleurs are properly installed. Perhaps they were trying to demonstrate that the claw hanger derailleur on the right can not be installed on a bike that has a derailleur hanger like the one on the left?
You also appear to be using the wrong terminology, as dropouts are the slot that the wheel axle is inserted into. The thing that the derailleur is attached to is a derailleur hanger, which can be claw type, removable or integrated(a non-removable part of the dropout).
You also appear to be using the wrong terminology, as dropouts are the slot that the wheel axle is inserted into. The thing that the derailleur is attached to is a derailleur hanger, which can be claw type, removable or integrated(a non-removable part of the dropout).
I realized i used the wrong terminology. I never had to deal with hangers until I came upon these type of bikes. rear drops always had hangers
#5
Senior Member
Join Date: Jan 2013
Location: South Jersey
Posts: 2,266
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 714 Post(s)
Liked 800 Times
in
475 Posts
Yeah, the pix on the left says "NO", which is don't mount a claw hanger DR on a built in hanger. But that is what the mfg installed derailleur did on the top picture, albeit the derailleur has a bolt on end instead of a claw hanger. one.
I realized i used the wrong terminology. I never had to deal with hangers until I came upon these type of bikes. rear drops always had hangers
I realized i used the wrong terminology. I never had to deal with hangers until I came upon these type of bikes. rear drops always had hangers
#6
Junior Member
Thread Starter
Claw hanger:
Standard mount:
If I can just use the standard mount over the dropout, then I can bypass the extra length and flexibility of the bike's built in hanger.
#7
Senior Member
Join Date: Jan 2013
Location: South Jersey
Posts: 2,266
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 714 Post(s)
Liked 800 Times
in
475 Posts
You can't remove those mounts from the derailleur. The derailleur was designed to work with the mounts in place, removing it will put the pivot in the wrong location
#8
Junior Member
Thread Starter
Maybe Shimano was just going cheap, kill two birds with one design. Usable for bikes in big box store and bike shop.
Last edited by tubesocksFred; 06-26-20 at 01:19 PM.
#10
Junior Member
Thread Starter
I want it to be destroyed, so I can upgrade to a real one, but then the whole interoperability of components between different grouppos requires alot more looking into.
#11
Dirty Heathen
Join Date: Oct 2015
Location: MC-778, 6250 fsw
Posts: 2,182
Bikes: 1997 Cannondale, 1976 Bridgestone, 1998 SoftRide, 1989 Klein, 1989 Black Lightning #0033
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 889 Post(s)
Liked 906 Times
in
534 Posts
7-speed? Pretty much any 7-9 speed Shimano RD will work. You don’t need to try to mod a Tourney; get an Altus, or Alivio, or heck, even an Exage 400 from 1993 would work.