Originally Posted by
dedhed
5P spindle is pitted. Alright I'll pick up a UN55 and throw it in. Measure twice and buy once - What! shell with is 70mm (measured 3x) and English threaded.
70mm English thread shells are not uncommon on Japanese production bikes. Takeaway: don't assume shell width is a reliable indicator of thread spec!
Question is do I get a 73x122 or a 68x122? Or clean up the old one with some emery cloth and new bearings? The person who will be riding this isn't a biker, won't be putting lots of miles on, and probably won't notice a bit of crunchy crank. She got the bike free with a stipulation to donate to the guy's college. I'm basically making it safe and ready to ride. Lube all the bearings, new brake pads, lube everything else, new bar tape, true up wheels etc.
You'll have to do a bit of finagling to get a Shimano cartridge to work, but it can be done. Personally, I'd check the LBS/co-op for a 5P spindle in better condition and failing that, just use the old spindle.