OK, I'm starting a new thread for this issue of trying to replace a broken crank on an early 1980s Fuji Royale, since I've learned a little more about the options. (You can see the previous thread also, Compatible replacement? 1980 Sugino Tourist crankset, 52/42T, 170mm, on Fuji Royale) I'm vintage also, unfamiliar with all the bottom bracket designs since the 1980s, and want to make this repair as trouble-free as possible (also not TOO expensive). I gather that the shell must be English, 68mm. I'm leaning toward using a completely new BB & crankset, but from what I've read, using an external bearing ("X-type"?) might require having the shell faced, which I'd rather not hassle with. Just want to order parts on ebay, get them ASAP, install them, and have my transportation back. Should I get a solid cartridge BB/bearing so I don't have to worry about imperfect shell facings? Or is the shell facing issue not really critical (as some appear to claim)? Can anyone give specific recommendations, given the following:
- Had problems with the square taper on the old crank slipping, am leery of problems with the JIS vs. ISO variations, & preference would be a splined interface, if not too expensive.
- I weigh about 235 lbs, & want the crank to NOT BREAK again on me, ever! I'm also tall, should I get a longer crank length than 170?
- I may later want to transfer parts over to a larger Falcon frame (also vintage), which appears to have a wider BB shell (73mm?, but has the same thread pitch as the Fuji) and used a longer spindle. Interchangeability/adjustability for a different shell size would be ideal if that's possible.
- Would like the crank to not require a tool for removal ("one-key" system?) Would also prefer no special tools for installation.
- By the way, the existing crankset is double, 52/42T, 170mm, made by Sugino, 1980.
In your response, please "dumb it down" for me! I've learned some of the terms, but my knowledge is limited and any biker slang flies right by me.