if 18" is what you are after, you could have put one on the 455 instead of the 20". a 460 is pretty much a 455 with a 24" bar. it seems they went in the less saw longer bar direction for the size matters sales. in my opinion, I think the 460 should be a 20" and they should have a 470 option for the 24" bar. a 460 with an 18" bar would zip through firewood. they are great saws for the money and will last.