Dropout alignment is simply the process of making certain that the dropout faces are perfectly parallel with each other. This ensures that the load placed on the axle when installing the wheel is linear or in line with the axle - not at an angle.
Basically, you are making sure that the bicycle itself is not doing anything detrimental to the axles...so that the only detrimental loads placed on the bike and parts is that which YOU AS THE RIDER place on the bike when using it.
When the bike is aligned properly and parts continue to break - then you know that either you need better quality parts OR a bike built to handle someone like yourself.
=8-)
__________________
5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life