I have ordered a Domane SLR 7 that will be here in June if I'm lucky. The specs state it has 12x100mm front fork and 12x142mm rear on the frame. I want to get a second set of wheels for it. The stock wheels say they are 142mm rear width. The second set I am looking at (Aeolus XXX 4) has two widths listed as 135/142. I assume such wheels can fit both widths with some kind of adapter? And this adapter is included with the wheels?

I know this is a dumb question but better safe than sorry.

Spacers.

But you still have to know some other things. Since I only have one bike that has thru-axles, I don't even know if there is something that must be considered for them. But on all my bikes with skewers, spacers and changing the actual axle length will do it. But I don't know that I've had every possible combination of frame and hub with my bikes. So maybe some others will have more informative babble.