Hi everyone,

I've been reading all the posts on these forums regarding Campy cranksets that have the 7mm hex self-extracting bolts.

I've been able to remove the one on the non-drive side using a 7 mm Allen wrench and a filed down pin spanner. The outer collar has a left hand thread, so I unscrew the hex bolt (counter clockwise) a little bit until it tightens, then I unscrew the outer collar (clockwise) until it tightens. I did this until I was able to remove the bolt.

However, the same technique doesn't work on the drive side. The outer collar doesn't budge. I've read a lot of posts that say you only need the Allen wrench and a lot of force to remove the stubborn bolt since it's self-extracting, but I think since the outer collar is left hand threaded and the inner bolt is right hand threaded I need to unscrew both.

Either way, I'm guessing it might have seized or I'm not doing it right. I'm trying to avoid going to the LBS or buying the special tool.

I have an early 80s era Bianchi that this crankset is on. I'm not sure what set it is, but here are the markings on it along with the bolt:





Any help would be great.

Thanks guys!

Matt