Replacing pivot bolt in old sidepull brake
#1
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Replacing pivot bolt in old sidepull brake
I have a first-generation Dura Ace sidepull brake on my Austro Daimler Vent Noir.
The front wheel has a fender and a Son Edelux II, both of which mount onto the brake pivot bolt through the fork. The fender and light mounts are thick enough that, with everything on the bike, the brake pivot bolt isn't quite long enough to go completely through the nut on the back of the fork.
I had to remove the concave washer on the back of the fork. But even now I can only get maybe 5 threads of engagement.
So: I wonder if I can replace the pivot bolt in the brake with a longer one.
1. Is that possible?
2. Where does one buy a longer brake pivot bolt?
3. Is there another solution I haven't considered?
The front wheel has a fender and a Son Edelux II, both of which mount onto the brake pivot bolt through the fork. The fender and light mounts are thick enough that, with everything on the bike, the brake pivot bolt isn't quite long enough to go completely through the nut on the back of the fork.
I had to remove the concave washer on the back of the fork. But even now I can only get maybe 5 threads of engagement.
So: I wonder if I can replace the pivot bolt in the brake with a longer one.
1. Is that possible?
2. Where does one buy a longer brake pivot bolt?
3. Is there another solution I haven't considered?
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I have a first-generation Dura Ace sidepull brake on my Austro Daimler Vent Noir.
The front wheel has a fender and a Son Edelux II, both of which mount onto the brake pivot bolt through the fork. The fender and light mounts are thick enough that, with everything on the bike, the brake pivot bolt isn't quite long enough to go completely through the nut on the back of the fork.
I had to remove the concave washer on the back of the fork. But even now I can only get maybe 5 threads of engagement.
So: I wonder if I can replace the pivot bolt in the brake with a longer one.
1. Is that possible?
2. Where does one buy a longer brake pivot bolt?
3. Is there another solution I haven't considered?
The front wheel has a fender and a Son Edelux II, both of which mount onto the brake pivot bolt through the fork. The fender and light mounts are thick enough that, with everything on the bike, the brake pivot bolt isn't quite long enough to go completely through the nut on the back of the fork.
I had to remove the concave washer on the back of the fork. But even now I can only get maybe 5 threads of engagement.
So: I wonder if I can replace the pivot bolt in the brake with a longer one.
1. Is that possible?
2. Where does one buy a longer brake pivot bolt?
3. Is there another solution I haven't considered?
One work around would be to drill out the back of the fork crown hole to accept the outer diameter of the recessed brake bolt (sorry, I'm at work right now - I don't recall the outer diameter of the recess bolt). Basically you drill the back of the fork crown with a size bit to permit the recessed nut to slide in. Now if your current brake bolt is not threaded that far down (darn-it, I just thought of this)....then you would need to run metric die over the existing brake bolt to thread it down a little more.
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Edit: Here is a link for the nuts: https://www.ebay.com/itm/BDW-brake-c...s/232862309847
A little off-topic, but for rear brakes, drilling out only the front part of the rear brake bridge to adapt to recessed nutted brakes is difficult, here is a 3D-printed solution which allows drilling out both sides and adapting back down to the correct diameter: https://www.thingiverse.com/thing:3662440
Last edited by dsbrantjr; 09-15-19 at 01:41 PM.
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