I've got an old road bike. I'm not exactly sure what the frame is as it was repainted. I've reason to believe the that bottom bracket is wrong because the crankset ring is too close to the chainstay.
The crankset is a shimano golden arrow, similar to this picture https://c2.staticflickr.com/8/7067/6994214279_d19b265a9a_z.jpg
I'm concerned about the offset as you can see above in this picture. On the non drive side the crank looks like it is designed to be much further in and on the drive side it is really close in.
Please advise me how one knows which bottom bracket is right for X bike. Shell width is reasonably obvious because otherwise it wont fit but what about axel length.
The frame is a late eighties / early 90s cinelli steel frame.
Some BB shells also have different design for the casing which means there is more space between the side of the shell and the crank. Are there any hard and fast rules for BB choice?