I didn’t really rate the CM in 27.5 flavour, it was ”okaaaay …” and had the advantage of being cheap, but felt draggy and despite the chunky tread, not that good in the slop.
BUT. Am running a CM on the front of my rigid SS 26er (with a Smorgasbord out back) and it’s great actually. Recall someone commenting on a previous thread that they work well as a 26 tyre, not so much in other sizes … not really sure why that would be, but hey-ho.
Don’t buy them at current price (£25ea), but if you see them at £15 or under (I paid £13 each), I think it’s great value, and a pretty good all round tyre.