Dent near bottom bracket on vintage steel frame
Bicycles Asked on July 19, 2021
I just bought myself an old vintage Koga Miyata and just realized today that there’s a weird dent on the frame near bottom bracket.
Is this something I should be worried about? Or is it normal with these kind of frames, and what’s it for?
EDIT judging from other pics of the same frameset it seems like it’s normal? https://www.velosaloon.com/products/koga-miyata-gents-touring-frame-in-58-5-cm-c-t-57-cm-c-c-with-high-tensile-1024-tubing
Any idea what they are for and why aren’t they symmetrical?
One Answer
The chainstay has been crimped (at the time of manufacture) to provide extra clearance for the chain rings. On some bikes, I’ve seen this clearance provided by having the bottom-bracket end of the chainstay be a solid plate (thinner than the chainstay tube).
The bike almost certainly came with a multi-gear crankset when new.
Correct answer by RLH on July 19, 2021
Add your own answers!
Ask a Question
Get help from others!
Recent Answers
- Jon Church on Why fry rice before boiling?
- Peter Machado on Why fry rice before boiling?
- Lex on Does Google Analytics track 404 page responses as valid page views?
- haakon.io on Why fry rice before boiling?
- Joshua Engel on Why fry rice before boiling?
Recent Questions
- How can I transform graph image into a tikzpicture LaTeX code?
- How Do I Get The Ifruit App Off Of Gta 5 / Grand Theft Auto 5
- Iv’e designed a space elevator using a series of lasers. do you know anybody i could submit the designs too that could manufacture the concept and put it to use
- Need help finding a book. Female OP protagonist, magic
- Why is the WWF pending games (“Your turn”) area replaced w/ a column of “Bonus & Reward”gift boxes?