Trying to build a touring bike from a vintage steel mountainbike frame. Is is an overall well maintained frame the only thing that worries me is this.
Any advice? Thanks
by Most_Joke_9267
Trying to build a touring bike from a vintage steel mountainbike frame. Is is an overall well maintained frame the only thing that worries me is this.
Any advice? Thanks
by Most_Joke_9267
11 Comments
Get your local bike shop to rerun/recut the threads. That should do it! Or use a wire brush and a lot of elbow grease.
A bottom bracket thread chasing tool would be the best solution. Such a tool made by a reputable brand is prohibitively expensive for most home mechanics, so there is one instance where I would not hesitate to pay a shop to do it right. Our local bike co-op has at least two of these tools and they are not used often enough.
A rotary tool with a brass wire wheel would clean it up real quick
The threads look fine, I’d blast it with some wd-40 and clean them out with a wire bottle brush and a nylon bottle brush on a drill.
I’m not an expert, but this doesn’t look that terrible. I would do the following:
– spray some wd40 and let it soak for a while.
– use maybe a soft wire brush in the direction of the threads, but probably a plastic brush would be enough
– wipe with a cloth
– maybe repeat once or twice
Maybe some rust converter in paste form in the inside, but not in the threads would also be ok, if not an overkill.
When you assemble, use some grease or antiseize and I believe you should be fine
Just make sure to grease everything when you reassemble it so it doesn’t happen again
It just looks like it’s been sitting a while. I bet those threads are in fine shape. I wouldn’t go to the trouble of having a shop run a tap through it. If it were my frame I’d do the following:
1. Spray some Boshield into the frame everywhere you see a hole.
2. Clean the threads with a nylon brush and some mineral spirits. If you want to remove surface rust, use a brass wire brush, which will clear rust from steel and won’t harm the threads.
3. As another commenter wrote, clean the threads with well-greased BB cups.
For final installation, use lots of grease on the BB shell threads, smear a thin coat of grease all over the BB shell, and grease the cups or retaining rings.
You should have no problems.
Toothbrush, wire brush and kerosene to clean and smear grease all over the inside, everywhere you can reach, before reinstalling.
Personally this doesn’t look bad at all. I’d start with PB blaster and tooth brush and go from there.
Doesn’t look bad. I’d just clean thoroughly and then install the new one with plenty of grease.
Looks totally fine, just Dremel with a wire brush bit or even a handheld wire brush and some WD40, and you’re good to go.