all cables stretch when new, until they stop stretching. You can buy some that are "pre-stretched" (maybe they are and maybe it's hype) as well as those that are mandrel-drawn (extra smooth surface) and coated with teflon (or something extra-slippery like it). I've used all of them, I can't say whether any of the "extras" made any difference to the quality of my life...up to a point cables is cables: I do prefer stainless steel over galvanized plain steel cause they don't rust.