I'm looking to get a specific set of chainring sizes: 24-36-48. I can only find one crankset that comes that way for something like $160.
Looking around the internet it seems you can buy individual sprockets that have a standard BCD, more or less. So how do I assemble a crankset with the chainring sizes I want? Can I start with a triple that has a 48T and replace the other two to be 24 and 36? Is there a standard BCD for the middle and inner sprockets, on those cranks you can replace them on? I'm rather mechanically inclined, and it seems like it should be an easy job. I just don't know what the standards are.
I'm not even sure if it's more expensive this way - I just need 24-36-48 at 170mm on square taper as cheap as I can.