Well, they came stock. The dual compound on the OEM HR-2 is apparently known for its suckitude in the traction department.
Once I wear these out, Ima go back to the good ole Michy Wild Rock'R2 Adv Reinforced, despite their retarded name. They have been my favorite tire since I put them on my old Reign back in the spring of 2016. I did get a flat *once* when I didn't check/top-up the rear tire and pinched it...
Before those, I *did* have an EXO DHR-2 on the rear. I pinched it BADLY the 1st time I had it out. I promptly moved it to my kid's bike. :D