Is there a source to get a bottom bracket for a '70s Raleigh Grand Prix, with cotter crank. I think mine is worn out from all those years and miles, though I have just repainted it and replaced a lot of it for the second time. The chain ring seems to have a lot of whip in it and hits the front casette unless its perfectly centered as I ride. Local bike shop says that part is not around anywhere. The threaded retainer on the outside looks like it would be hard to remove. The local guy said if he could get that off maybe he could shim it some way inside.
Thanks a million
Answer I am not aware of any source for new cottered-crank bottom brackets. Your best bet would be a shop featuring used/vintage equipment. Even then, the state of those parts is bound to be questionable.
If you really want to keep riding the bike ( a true classic), then I would suggest swapping out the cottered-crank and BB for a more up to date cotter-less, square-taper crank and BB unit.
I can answer most inquiries with respect to bicycle assembly, repair, tuning and maintenance.
I am less than inclined to speak on such questions as "What kind of bike should I buy?", &/or "What is this bike worth?", etc. Any answers to these types of questions may correlate poorly to an acceptable "fact/sarcasm" ratio.
7 seasons of "Professional" bicycle service/repair, etc.
4 seasons as Instructor, Professional Bicycle Mechanic training college.
n-1 seasons of riding, cracking, crushing, mutilating and breaking bikes of any & all varieties, and thus requiring intense and at-hand skills development, etc.
Education/Credentials Certified Professional Bicycle Mechanic; Winterborne Bicycle Institute/Conestoga College
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Winterborne Bicycle Institute