Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  

Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Thread Tools Search this Thread
Old 02-26-10, 06:29 PM   #1
Senior Member
Thread Starter
BikeLover1989's Avatar
Join Date: Nov 2008
Location: Toronto, Ontario
Bikes: Kona Dew Plus, Giant Trance X4
Posts: 66
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Disc hub torx bolt threading worn away

I have a mavic crossride disc wheel, and on the hub, apparently one of the holes for the torx bolts had lost a lot of its threading when I changed out the rotor on the wheel. Keep in mind, the rotor I changed out, I torqued it the way it should be, 55 inch pounds. When I was securing the new rotor, 5 of the torx bolts managed to screw in perfectly to 55 inch pounds, but one just kept spinning, and it's at that time I realized the threading in that hole was partially worn away. What should I do to prevent this from happening again?
BikeLover1989 is offline   Reply With Quote
Old 02-26-10, 06:53 PM   #2
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
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
Posts: 35,049
Mentioned: 100 Post(s)
Tagged: 1 Thread(s)
Quoted: 3441 Post(s)
I'm not familiar with that hub, but there's almost always plenty of meat at the disc face, so there shouldn't be any problem fitting a helicoil insert, which in my opinion should have been done in the first place. I'm not a fan of the way so many companies are fitting screws directly into tapped aluminum, but I don't want to start a flame war here, so let's just call it my prejudice.

Anyway, this can easily be saved, and while you're at it, consider helicoiling all 6 holes. Any good LBS can do the job, or you can do it yourself if you have decent hand skill.
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“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.
FBinNY is offline   Reply With Quote
Old 02-26-10, 08:32 PM   #3
Senior Member
joejack951's Avatar
Join Date: May 2004
Location: Wilmington, DE
Bikes: 2016 Hong Fu FM-079-F, 1984 Trek 660, 2003 Specialized Hardrock, 2004 LOOK KG386i (RIP), 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1, 2016 Islabikes Beinn 20 (son's)
Posts: 11,504
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 897 Post(s)
If the holes go all the way through, it might be easier to use a longer bolt and nut than to Helicoil the hole. The American Classic hub I'm using on my commuter definitely does not have enough material for a Helicoil around the holes but they do go all the way through.
joejack951 is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -6. The time now is 05:54 AM.

  • Ask a Question
    get answers from real people!
Click to start entering your question.