Originally Posted by
ChrisEeeSee
Thanks guys. Is there any disadvantage of going this route instead of finding a bottom bracket from the time period my bike was made? Also, how would I determine what spindle length I need? Crankset is a double. Crank arm length wouldn't matter right?
It depends how much you value "correctness". If you just want a riding bike go with a cartridge, if you're making a museum piece use the old style. As far as length you can either search for documentation on your crank or just go ahead and install it on a known spindle and do the math to determine how much it needs to move.