Threaded steerer question
#1
Senior Member
Thread Starter
Join Date: Jul 2004
Location: Twin Cities
Posts: 927
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 206 Post(s)
Liked 102 Times
in
46 Posts
Threaded steerer question
I have a fork that is not original to a frame, and I really need to make this work. With the headset installed, the top lock nut has enough of the steerer threads in it to make me comfortable with the setup (about 3/4 of the nut is threaded onto the steerer). But this bike originally called for center pull brakes which means I need to add the brake cable hanger to the headset. So . . . how much of the top lock nut needs to be threaded onto the steerer to be safe or adequate? Any suggestions, opinions, recommendations are greatly appreciated.
__________________
Some days, it's not even worth gnawing through the restraints.
Some days, it's not even worth gnawing through the restraints.
#2
Senior Member
Join Date: Jun 2018
Posts: 257
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 76 Post(s)
Likes: 0
Liked 19 Times
in
15 Posts
Tektro make a hanger that mounts to the hole in the bottom of the fork. There might be others available too.
https://www.modernbike.com/tektro-fr...nti-fork-mount
https://www.modernbike.com/tektro-fr...nti-fork-mount
Likes For 88Tempo:
#3
Banned
clamp on the stem types from QBP,
or if cantilever center pull brake posts are there ? put on V brakes
or if cantilever center pull brake posts are there ? put on V brakes
Likes For fietsbob:
#4
Cat 6
Join Date: Dec 2007
Location: Mountain Brook, AL
Posts: 7,482
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 500 Post(s)
Liked 183 Times
in
118 Posts
The couple times I've had to worry about this - if the nut tightens, I was OK. If the nut would just "spin" where it needed to tighten - then obviously it was not going to work, AND I was screwing up my threads - so don't repeat
Some will tell you three full threads is minimum to make it work. To be clear - some of this will depend upon the manufacturing tolerances between your steerer and selected headset.
[If you look at engineering analysis, even full depth isn't enough]
A Tange Levin can be a relatively inexpensive solution in many cases.
Some will tell you three full threads is minimum to make it work. To be clear - some of this will depend upon the manufacturing tolerances between your steerer and selected headset.
[If you look at engineering analysis, even full depth isn't enough]
A Tange Levin can be a relatively inexpensive solution in many cases.
Likes For Ex Pres:
#5
Senior Member
Thread Starter
Join Date: Jul 2004
Location: Twin Cities
Posts: 927
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 206 Post(s)
Liked 102 Times
in
46 Posts
Thanks for the suggestions. I can go with regular side pull brakes if I have to. I also tried a Tange Levin headset (nice classic look), but had to switch to the cheaper Tange Passage to gain a few more mm in stack height. I can get three full threads pretty easily. Again, thanks.
__________________
Some days, it's not even worth gnawing through the restraints.
Some days, it's not even worth gnawing through the restraints.
#6
Senior Member
Join Date: Nov 2004
Posts: 23,223
Mentioned: 654 Post(s)
Tagged: 1 Thread(s)
Quoted: 4722 Post(s)
Likes: 0
Liked 3,036 Times
in
1,874 Posts
The rule of thumb is to have a minimum of three full turns of engagement for the locknut. For a standard 24 TPI headset, this equates to 1/8" engagement.
Likes For T-Mar:
#7
Senior Member
Join Date: Sep 2015
Location: Madison, WI
Posts: 2,701
Mentioned: 52 Post(s)
Tagged: 0 Thread(s)
Quoted: 1136 Post(s)
Liked 650 Times
in
336 Posts
Paul makes a version of their Funky Monkey Cable Hanger that clamps onto the vertical part of the quill stem. A bit pricy ($40-50) but should be the nicest cable hanger you're going to find. Get the 7/8" version for a quill stem.
I've used the Tektro fork hole-mounted cable hanger before and it works well, but might not work depending on what else you are using the fork hole for. With centerpulls it might not work as I believe the Tektro cable hanger has a recessed hole for the mounting bolt.
I've used the Tektro fork hole-mounted cable hanger before and it works well, but might not work depending on what else you are using the fork hole for. With centerpulls it might not work as I believe the Tektro cable hanger has a recessed hole for the mounting bolt.
Likes For TenGrainBread:
#8
Senior Member
Join Date: Oct 2015
Location: PDX
Posts: 13,038
Bikes: Merz x 5 + Specialized Merz Allez x 2, Strawberry/Newlands/DiNucci/Ti x3, Gordon, Fuso/Moulton x2, Bornstein, Paisley,1958-74 Paramounts x3, 3rensho, 74 Moto TC, 73-78 Raleigh Pro's x5, Marinoni x2, 1960 Cinelli SC, 1980 Bianchi SC, PX-10 X 2
Mentioned: 267 Post(s)
Tagged: 0 Thread(s)
Quoted: 4510 Post(s)
Liked 6,377 Times
in
3,667 Posts
The couple times I've had to worry about this - if the nut tightens, I was OK. If the nut would just "spin" where it needed to tighten - then obviously it was not going to work, AND I was screwing up my threads - so don't repeat
Some will tell you three full threads is minimum to make it work. To be clear - some of this will depend upon the manufacturing tolerances between your steerer and selected headset.
[If you look at engineering analysis, even full depth isn't enough]
A Tange Levin can be a relatively inexpensive solution in many cases.
Some will tell you three full threads is minimum to make it work. To be clear - some of this will depend upon the manufacturing tolerances between your steerer and selected headset.
[If you look at engineering analysis, even full depth isn't enough]
A Tange Levin can be a relatively inexpensive solution in many cases.
IMHO, as a lifelong mechanic/technician including 25+ years professionally as a fomoco and ASE Senior Master certified, any minimum rule of thumb should be considered under ideal conditions, good to very good threads that match closely, ymmv.
Likes For merziac: