Trying to replace my Bontrager brakes on my Madone with the new Direct mount Dura-Ace ones. I was able to get the front off just fine but the 4mm screw on the rear stripped almost instantly. I feel like Bontrager sources really weak screws, its happened on my Speed concept as well.
How can i get this out. Not super excited to try to dremel a slit in it to use a screwdriver and not sure I can get enough hold to get it to release.
ideas?
Drill the head off and tap it out in reverse with a small, fine center punch. I have not done this on bike parts but it works in other applications.
This has worked like a charm for me.
http://www.amazon.com/Alden-8440P-Grabit-Damaged-Extractor/dp/B001A4CWHO/ref=pd_bxgy_hi_img_y
Usually, as indicated above, you just need to drill off the head. Once the head falls off, the screw is often easy to remove with your fingers or pliers. A step drill bit works great.
I went to the local Ace and picked a set of extractors. I will report back if I can get them to work.
Cut a slot into it with a dremel & use a screwdriver to take it out.