Well, not exactly. I meant to say "But, I'm pretty sure you can go from 135 through-axle to 142 with the right end caps". I hope I didn't make this any more confusing. The point is that I don't think they make end caps that can go from 135 spacing to Boost spacing. They actually moved the cassette, didn't they? I don't really know. I'm currently running 142 on my main bike, 148 on my HT, and I do have a few 135 in the stable, but I've never bothered or had the need to convert them.