About to straighten out my derailleur hanger. Any advice?
#76
Senior Member
To nail it home.....
No washer is needed because the wheel's mounting faces serves that purpose.
Also consider the nature of the force applied. It's not straight across as would be with a press, but a twisting force applied as a torque, which helps move the hanger in an arc.
In any case, those familiar with bike repair know that this job is very common and easily done (in steel) with no complications.
No washer is needed because the wheel's mounting faces serves that purpose.
Also consider the nature of the force applied. It's not straight across as would be with a press, but a twisting force applied as a torque, which helps move the hanger in an arc.
In any case, those familiar with bike repair know that this job is very common and easily done (in steel) with no complications.
#77
Senior Member
Join Date: Dec 2010
Location: northern Deep South
Posts: 8,904
Bikes: Fuji Touring, Novara Randonee
Mentioned: 36 Post(s)
Tagged: 0 Thread(s)
Quoted: 2604 Post(s)
Liked 1,933 Times
in
1,213 Posts
The answer is kind of like "how many men does it take to fix a pothole?" One, of course, but a dozen or more (a) BF people "helping" or (b) truck drivers, flagmen, backhoe operators, and supervisors.
#78
Senior Member
Join Date: Apr 2016
Posts: 1,235
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 500 Post(s)
Liked 435 Times
in
334 Posts
Parallel.
Likes For grumpus:
#79
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,725
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 140 Post(s)
Tagged: 1 Thread(s)
Quoted: 5791 Post(s)
Liked 2,581 Times
in
1,431 Posts
FWIW -I was referencing the screw axis.
In my world, we'd often say square to mean either parallel or perpendicular, or both.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Likes For grumpus:
#81
Senior Member
Likes For Duragrouch:
Likes For BTinNYC:
#83
Senior Member
Join Date: Jan 2005
Location: Baltimore, MD
Posts: 5,374
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 2483 Post(s)
Liked 2,955 Times
in
1,678 Posts
#85
Rider. Wanderer. Creator.
Thread Starter
Join Date: May 2007
Location: New Jersey
Posts: 774
Bikes: Bike Friday Pocket Rocket, Cinelli Hobootleg, Zizzo Liberte
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 394 Post(s)
Liked 781 Times
in
377 Posts
Update
Finally got a chance to work on this! Made some initial progress with the Park Tool Derailleur Alignment Gauge, the older chrome one.
Things were going pretty well until the rear wheel fell out. It was then that I realized that the hanger had been pulled back, opening up the dropout...
Bike Friday advised me to use a crescent wrench (positioned in line with the dropout and frame) to bend the dropout forward again, using an axle keep from pulling it too far. It worked great.
I then remounted the rear wheel and continued to use the DAG. I'm pretty close now.
I'll be doing the final alignment soon and then mounting a new RD and putting the bike back together.
For those that have used the DAG - how precise do you need to be? 1mm between measuring points? 2mm? more?
Thanks everyone for your help!
Things were going pretty well until the rear wheel fell out. It was then that I realized that the hanger had been pulled back, opening up the dropout...
Bike Friday advised me to use a crescent wrench (positioned in line with the dropout and frame) to bend the dropout forward again, using an axle keep from pulling it too far. It worked great.
I then remounted the rear wheel and continued to use the DAG. I'm pretty close now.
I'll be doing the final alignment soon and then mounting a new RD and putting the bike back together.
For those that have used the DAG - how precise do you need to be? 1mm between measuring points? 2mm? more?
Thanks everyone for your help!
Likes For john m flores:
#86
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,725
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 140 Post(s)
Tagged: 1 Thread(s)
Quoted: 5791 Post(s)
Liked 2,581 Times
in
1,431 Posts
Consider the 12" length of the beam vs. 1or 2mm variation, then glance at a sine chart and it'll be obvious that the method is far more precise than necessary. Either is more than fine.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Likes For FBinNY:
#87
Half way there
Join Date: Sep 2015
Location: North Carolina
Posts: 2,957
Bikes: Many, and the list changes frequently
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 986 Post(s)
Liked 880 Times
in
527 Posts
About this thread: I had a hard time reading all of the 'over-the-top' advice given here, but accept that it was given in the spirit of helpfulness. The fact is that with the alignment tool, the job is quickly and easily accomplished. No need to over-complicate it with hydraulic presses, bench vises, etc. It does take a bit of finesse to determine the right angle for bending, but gentle nudges on the tool arm get you there nicely. Most first time users want to crank on the tool and go too far.
Likes For Moe Zhoost:
Likes For Duragrouch:
#89
Senior Member
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 5,794
Bikes: 1989 Cinelli Supercorsa
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 3513 Post(s)
Liked 2,927 Times
in
1,776 Posts
Seems like there’s an “S” bend in there. How did that thing get so jacked up?
#90
Senior Member
#91
Senior Member
Join Date: Oct 2008
Location: Northern NY...Brownville
Posts: 2,574
Bikes: Specialized Aethos, Specialized Diverge Comp E5
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 242 Post(s)
Liked 455 Times
in
266 Posts
1-2mm variance using three points of contact...bottom to set the gauge, top is the Y axis and left side of the wheel is the X axis, perpendicular to the Y axis...is great.
Good job especially fixing the dropout...I've had to do that in the past and it is not a lot of fun and there really aren't any specific tools to fix it other than a good Crescent wrench.
Well done, chapeau...
Good job especially fixing the dropout...I've had to do that in the past and it is not a lot of fun and there really aren't any specific tools to fix it other than a good Crescent wrench.
Well done, chapeau...
Likes For Kai Winters:
#92
Senior Member
Join Date: Apr 2011
Posts: 7,067
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
Quoted: 4409 Post(s)
Liked 1,563 Times
in
1,026 Posts
Great job!
#95
Rider. Wanderer. Creator.
Thread Starter
Join Date: May 2007
Location: New Jersey
Posts: 774
Bikes: Bike Friday Pocket Rocket, Cinelli Hobootleg, Zizzo Liberte
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 394 Post(s)
Liked 781 Times
in
377 Posts
Thanks again everyone for your help and support! The All Packa is back on the road!
The Advent Super Short is a 1x but I'm currently running a 50/34 2x front. The derailleur works great with the 34T. If I try with the 50T, I can only use the smaller end of the cassette. I may try swapping out the 50T for a 42T or something and see if it works. We'll see.
The Advent Super Short is a 1x but I'm currently running a 50/34 2x front. The derailleur works great with the 34T. If I try with the 50T, I can only use the smaller end of the cassette. I may try swapping out the 50T for a 42T or something and see if it works. We'll see.
__________________
--------------------------------------
Rider. Wanderer. Creator.
JohnMFlores.com | YouTube: JohnMFlores
Insta: JohnMichaelFlores | TikTok: @johnnymotoflores
--------------------------------------
Rider. Wanderer. Creator.
JohnMFlores.com | YouTube: JohnMFlores
Insta: JohnMichaelFlores | TikTok: @johnnymotoflores
Likes For john m flores:
#96
Senior Member
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 5,794
Bikes: 1989 Cinelli Supercorsa
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 3513 Post(s)
Liked 2,927 Times
in
1,776 Posts
If nothing else, at least you cleaned your drivetrain.