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

Reply
 
Thread Tools Search this Thread
Old 04-01-09, 07:26 AM   #1
fiataccompli
Steel Member
Thread Starter
 
fiataccompli's Avatar
 
Join Date: Jul 2008
Location: Knoxville, TN
Bikes: N + 1
Posts: 1,446
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
DIY dropout alignment measuring tool

I was wondering if folks here could describe (or, even better...show pics) any home made rigs they've used to measure dropout alignment. I have a few bikes with frames that have had the rear triangle re-spaced and (not one of the respaced ones) an old 6 speed (rear, that is) road bike that seems to have turned up a bent rear axle, so it seems like I should have a tool to measure dropout alignment.

corollary question - would a cassette that appears to wobble slightly when the hub is freewheeling indicate a bent axle?
fiataccompli is offline   Reply With Quote
Old 04-01-09, 07:37 AM   #2
andr0id
Senior Member
 
andr0id's Avatar
 
Join Date: Feb 2009
Bikes:
Posts: 2,203
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 193 Post(s)
I think it would be a pain in the butt to make dropout alignment tools when a set only cost $80.
Here's a link to photos though.
http://www.parktool.com/repair/readhowto.asp?id=40

Answer to 2nd question is no. It is an result of the machine that cuts the threads into cast or forged parts not being perfectly parallel to the axis. Not a problem as they allow a certain mfg tolerance for this.
andr0id is offline   Reply With Quote
Old 04-01-09, 09:57 AM   #3
Andreasaway
Senior Member
 
Join Date: Oct 2005
Bikes:
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You can check alignment using two threaded axles. Basically you put two lock nuts on each axle, then lock them down on each dropout ( make sure they are fully pulled into the dropout). Make sure the ends of the axles are close to touching in the middle, so you can easily see the misalignment. If you need to make an adjustment, you will need a bit of tubing to slide over the axle to get more torque. Have Fun

IF you plan on using it a fair bit, replace the locknuts with wing nuts.
Andreasaway is offline   Reply With Quote
Reply


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 11:37 PM.