I bought a cheap vintage road bike, only problem was a broken bottom bracket/crankset. The bike was originally setup as a 1X, with an 8 gear cassette in the rear.
It has a threadless bottom bracket shell, so I ended up opting for this as modern equivs are kinda hard to source:
https://www.sunrace.com/en/products/detail/bbs08The axle is 127mm on the new bb, will this be a problem if I only have a single chainring on the front? Bike shop guy said the axle should be shorter, but it's hard to find shorter in this threadless standard.