XC race mount
I built up a carbon hardtail race bike and thought these would be a good choice. I have the same Crest combo on my full suspension and they have proved their usefulness. I'm confident the 27.5s will be as durable. These are a great bang for your buck.
I actually don't mind the QR, an option would be nice for those that want that but the QR has held up in pretty tough conditions.